KR20060031002A - A flat display device - Google Patents

Abstract

The present invention relates to a flat panel display. According to an aspect of the present invention, there is provided a flat panel display panel including at least two flat panel display panels, a backlight assembly for supplying light to the flat panel display panel, and an opening for accommodating the backlight assembly and exposing at least one of the flat panel display panels to the outside. A bottom chassis formed and sealing around the opening of the bottom chassis. Through the present invention, it is possible to prevent the flow of foreign matter from entering the inside of the flat panel display.

Flat Panel Display, Dual, Cell Phone, Foreign Objects, Intrusion

Description

Flat Panel Display {A FLAT DISPLAY DEVICE}

1 is an exploded perspective view of a flat panel display device according to a first embodiment of the present invention.

2 is a partially coupled perspective view of a flat panel display device according to a first exemplary embodiment of the present invention.

3 is a partially exploded perspective view of a flat panel display device according to a second exemplary embodiment of the present invention.

4 is a partially coupled perspective view of a flat panel display device according to a second exemplary embodiment of the present invention.

5 is a partially exploded perspective view of a flat panel display device according to a third exemplary embodiment of the present invention.

6 is a partially coupled perspective view of a flat panel display device according to a third exemplary embodiment of the present invention.

The present invention relates to a flat panel display device, and more particularly, to a flat panel display device that can prevent intrusion of foreign matter.

With the recent development of semiconductor technology, which is rapidly developing in recent years, the demand for flat panel display devices that are smaller and lighter and has improved performance is exploding.

The liquid crystal display (LCD), which has recently been in the spotlight among the flat panel display devices, has advantages such as miniaturization, light weight, and low power consumption, thereby overcoming the disadvantages of the conventional cathode ray tube (CRT). It has been attracting attention as an alternative means, and now it is being installed and used in small and medium-sized monitors and TVs as well as mobile phones and PDAs (portable digital assistor) that require a flat panel display device.

A general liquid crystal display device applies voltage to a specific molecular array of a liquid crystal to convert it into another molecular array, and visually changes optical properties such as birefringence, photoreactivity, dichroism, and light scattering characteristics of the liquid crystal cell emitted by the molecular array It is a display device which displays information using modulation of the light by a liquid crystal cell as converting into a change.

Recently, organic light emitting diodes (OLEDs) have been in the spotlight as one of the next generation flat panel display devices. The organic light emitting diode displays an image using a self-luminous phenomenon in which electrons and holes injected from a cathode and an anode combine in an organic material to emit light. Since the organic light emitting diode is an active device that emits light by itself, the light emitting efficiency is high, the power consumption is low, and it can be driven at 15V or less, so it is suitable as a small flat panel display device and the manufacturing cost is low.

Therefore, the above-mentioned liquid crystal display device or organic light emitting diode is adopted in most of the small flat panel display devices used in mobile phones and the like. Here, since most of the mobile phones are manufactured in the form of folders for the convenience of the user, dual flat panel display devices each having two display devices attached to the front and rear surfaces of the mobile phone folder are widely used.

However, since the locking members are formed on each of the components of the small flat panel display device and assembled, the foreign matter easily enters therebetween, and the backlight cannot display a clear image when the image is displayed on the flat panel display panel. There is this. That is, it is impossible to realize a clear screen due to foreign matters that invade the flat panel display panel. In addition, foreign matter may penetrate into each part of the flat panel display device manufactured in a very small size and may cause a malfunction of the flat panel display device. In particular, in a dual flat panel display apparatus using two flat panel display panels, a large amount of foreign matter is introduced through a bottom chassis having an opening formed by fixing the sub flat panel display panel.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and to provide a flat panel display device having a structure capable of preventing intrusion of foreign matter.

According to an aspect of the present invention, there is provided a flat panel display panel including at least two flat panel display panels, a backlight assembly for supplying light to the flat panel display panel, and an opening for accommodating the backlight assembly and exposing at least one of the flat panel display panels to the outside. A bottom chassis formed and sealing around the opening of the bottom chassis.

The bottom chassis includes a support portion bent by cutting a portion around the opening, and the support portion is adjacent to the side surface of the flat panel to fix the flat panel.

It is preferable to attach a tape to the perforations to seal the perforations of the bottom chassis formed by bending the support.                     

In addition, the flat panel display according to the present invention may further include a support that is attached around the opening of the bottom chassis to securely support at least one flat panel of the flat panel display panel.

Here, the engaging portion formed on the side of the support may be fixed to another engaging portion bent along the opening of the bottom chassis.

It is desirable to attach the tape around the opening of the bottom chassis to seal around the opening of the bottom chassis in contact with the backlight assembly.

In addition, the flat panel display according to the present invention further includes a mold frame having an opening formed around the side of the backlight assembly, wherein a support is protruded around the opening of the mold frame to penetrate the opening of the bottom chassis. The bottom chassis may be fixedly coupled to the bottom chassis, and the support unit may fix and support at least one flat panel display panel among the flat panel display panels.

Here, the bottom chassis may include another support portion bent along an opening of the bottom chassis to surround and fix the support portion of the mold frame.

And tape is attached around the opening of the bottom chassis to seal around the opening of the bottom chassis in contact with the mold frame.

At least one of the flat panel display panels may be a liquid crystal display panel.

The flat panel display may be for a cell phone.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 6. These embodiments of the present invention are merely for illustrating the present invention, but the present invention is not limited thereto.

FIG. 1 is an exploded perspective view of a flat panel display device 100 according to an exemplary embodiment of the present invention, in which a flat panel display device including a main flat panel display panel 200 and a sub flat panel display panel 300 is exploded. 1 illustrates a dual flat panel display in which the main flat panel display panel 200 and the sub flat panel display panel 300 face each other as an example of a flat panel display device according to an embodiment of the present invention. The structure and arrangement of the flat panel display device according to the present invention are provided to illustrate, but the present invention is not limited thereto. Therefore, the structure and arrangement of the flat panel display may be variously modified.

The flat panel display device 100 shown in FIG. 1 includes a flat panel display panel assembly 250 and a backlight assembly 900 that supplies light to the flat panel display panels 200 and 300. In addition, a top chassis 361, a mold frame 336, and a bottom chassis 362 are provided to fix and support them.

The flat panel display panel assembly 250 includes a main flat panel display panel 200, a second flat panel display panel 300, a first flexible circuit board 350, a second flexible circuit board 360, and an integrated circuit chip 620. And a printed circuit board 610. Although two flat panel display panels are shown in FIG. 1, these are merely to illustrate the present invention, and the present invention is not limited thereto. Therefore, it is only necessary to include two or more, that is, at least two flat panel display panels. In addition, although two liquid crystal display panels are shown as the flat panel display panels 200 and 300 in FIG. 1, these are merely to illustrate the flat panel display panel used in the present invention, but the present invention is not limited thereto. Therefore, it is only necessary to include at least one liquid crystal display panel, and the organic light emitting diode may be used as the flat panel display panel.

The main flat panel display panel 200 is larger than the sub flat panel display panel 300 facing the main flat panel display panel 200. The flat panel display device 100 can be used in particular for a clamshell cell phone. The main flat panel display panel 200 is located on the inner surface of the cell phone folder and the sub flat panel display panel 300 is located on the outer surface of the cell phone folder. Therefore, when the folder is closed, a relatively small amount of information such as time can be contacted through the sub-flat display panel 300 having a small screen size, and the main flat panel display panel having a large screen size is opened by opening a folder when talking to the other party. At 200, a relatively large amount of information can be encountered.

Hereinafter, an internal structure of the main flat panel display panel 200 which is a liquid crystal display panel will be described. Since the structure of the sub flat panel display panel 300 is the same as that of the main flat panel display panel 200, a detailed description thereof will be omitted.

The TFT substrate 200b disposed below the main flat panel display panel 200 is a transparent glass substrate on which a matrix thin film transistor is formed. A data line is connected to a source terminal and a gate line is connected to a gate terminal. In the drain terminal, a pixel electrode made of transparent indium tin oxide (ITO) as a conductive material is formed.

When electrical signals are input from the printed circuit board 610 to the data lines and the gate lines of the main flat panel display panel 200, electrical signals are input to the source and gate terminals of the TFT, and the TFTs are input according to the input of these electrical signals. Is turned on or turned off so that an electrical signal necessary for pixel formation is output to the drain terminal.                     

On the other hand, the color filter substrate 200a is disposed on the TFT substrate 200b. The color filter substrate 200a is a substrate in which RGB pixels, which are color pixels in which a predetermined color is expressed while light passes, are formed by a thin film process, and a common electrode made of ITO is coated on the entire surface thereof. When power is applied to the gate terminal and the source terminal of the TFT and the thin film transistor is turned on, an electric field is formed between the pixel electrode and the common electrode of the color filter substrate. By the electric field, the arrangement angle of the liquid crystal injected between the TFT substrate 200b and the color filter substrate 200a is changed, and the light transmittance is changed according to the changed arrangement angle to obtain a desired pixel. Polarizers (not shown) are attached to both surfaces of the TFT substrate 200b and the color filter substrate 200a.

The integrated circuit chip 620 applies a driving signal and a timing signal to the gate line and the data line of the TFT to control the arrangement angle of the liquid crystals and the timing of the liquid crystals of the main flat panel display panel 200. The integrated circuit chip 620 is attached on the TFT substrate 200b and surrounded by the protective film 621. The integrated circuit chip 620 generates a data signal, a gate driving signal, which is a signal for driving the main flat panel display panel 200, and a plurality of timing signals for applying these signals at an appropriate time, thereby generating a gate driving signal and data. The signal is applied to the gate line and the data line of the main flat panel display panel 200, respectively.

The second flexible circuit board 360 surrounds one side of the bottom chassis 362 and connects the main flat panel display panel 200 and the second flat panel display panel 300 to each other. In FIG. 1, the second flexible circuit board 360 is cut off for convenience of illustration, but is actually connected. As such, since the main flat panel display panel 200 and the sub flat panel display panel 300 are connected to each other, the driving signal of the integrated circuit chip 620 is transmitted to the sub flat panel display panel 300 through the main flat panel display panel 200. Thus, the sub flat panel display panel 300 is controlled by the integrated circuit chip 620.

A plurality of resistor elements 6103 are mounted on a printed circuit board 610 that transmits a signal to the first flexible printed circuit board 350, and a cell phone connector 6101 is mounted at an end thereof. The first flexible printed circuit board 350 receives a signal according to the opening and closing degree of the folder window for the mobile phone through the mobile phone connector 6101. The first flexible printed circuit board 350 connects the main flat panel display panel 200 and the printed circuit board 610. In FIG. 1, the first flexible circuit board 350 is cut off for convenience of illustration, but is actually connected.

The backlight assembly 900 is provided between the main flat panel display panel 200 and the sub flat panel display panel 300 to provide uniform light emitted from the light source 910 to both flat panel display panels 200 and 300. . The backlight assembly 900 is accommodated in the bottom chassis 362 and is fixed. The reflective sheet 343 reflects and transmits light, the light guide plate 341 for guiding light, and a pair of optical sheets 342a for improving brightness. , 342b) and a light source 910. The reflective sheet 343 transmits a part of the light emitted from the light source to the lower part to supply the light to the sub flat panel display panel 300.

Although FIG. 1 shows a light emitting diode (LED) 910 mounted on a substrate 950 as a light source, this is merely to illustrate the invention, but the invention is not limited thereto. Therefore, not only other light sources such as lamps can be used as the light source, but also linear light sources and surface light sources in which light emitting diodes are modularized. Also, although the number of light emitting diodes is shown as three, this is merely to illustrate the present invention and the present invention is not limited thereto. Therefore, the number of light emitting diodes can be varied as needed. The substrate 950 is connected to the third flexible printed circuit board 370 to receive a light source control signal from the printed circuit board 610 to drive the light source 910.

The substrate 950 on which the light source 910 is mounted is received and fixed on the mold frame 336, and the flat panel display panel assembly 250 and the backlight assembly 900 are fixedly supported. A top chassis 361 and a bottom chassis 362 are respectively provided on the upper and lower portions of the flat panel display panel 250 to form the flat panel display device 100 by combining them. An opening 3621 is formed in the bottom chassis 362 to fix the sub flat panel display panel 300. The lower part of the bottom chassis 362 is covered with a printed circuit board 610 having an opening 6105 formed thereon so that the sub flat panel display panel 300 is exposed to the outside. A nonconductive member 363 is inserted therebetween to prevent the bottom chassis 362 and the second flexible circuit board 360 from contacting each other and shorting.

In the flat panel display 100 according to the first embodiment of the present invention, the periphery of the opening 3621 of the bottom chassis 362 is sealed. A tape 364 is attached to seal around the opening 3621 formed in the bottom chassis 362. Here, the tape 364 may be made of, for example, a resin film or the like, and serves to prevent foreign matter from invading from the outside through the opening 3621 formed in the bottom chassis 362. Hereinafter, the lower structure of the flat panel display device 100 that can prevent the intrusion of foreign substances will be described in more detail with reference to FIG. 2.                     

FIG. 2 is a partially coupled perspective view of a flat panel display device according to a first embodiment of the present invention, in which the flat panel display device shown in FIG. 1 is rotated by 180 ° with respect to the Y-axis direction. In FIG. 2, the printed circuit board 610 of the lowermost portion of the flat panel display of FIG. 1 is omitted for convenience.

As shown in FIG. 2, the bottom chassis 362 includes a support 3625 that is bent by cutting a portion around its opening 3621 (shown in FIG. 1). That is, a portion of the bottom chassis of FIG. 2 is cut in a square shape, and then bent with the Y-axis as the axis to fix and support the secondary flat panel display panel 300. The support part 3625 fixes and supports the sub flat display panel 300 adjacent to the side of the sub flat display panel 300. Accordingly, the secondary flat panel display panel 300 can be fixedly supported without installing a separate component, thereby reducing the overall volume and weight of the flat panel display device. In particular, although FIG. 2 illustrates that two support portions 3625 are formed along the X-axis direction and one support portion 3625 is formed along the Y-axis direction, this is merely to exemplify the present invention. This is not limited to this. Therefore, the support portion may be formed in a different number. Using such a flat panel display for a mobile phone has the advantage of miniaturizing the size of a mobile phone.

On the other hand, since the support part 3625 is bent and the perforation part 3623 is formed in the bottom chassis 362, foreign matter enters the inside of the flat panel display device through the perforation part 3623, resulting in malfunction of the flat panel display device. May cause. However, in the present invention, the tape 364 (shown in dotted lines) is attached around the opening of the bottom chassis 362 to seal the periphery portion 3623 while sealing the periphery of the opening of the bottom chassis 362. As described above, the foreign matter P is inherently blocked from invading through the puncturing part 3623. Accordingly, the flat panel display device operates smoothly without failure and durability is improved.

Hereinafter, another modification of the present invention will be described in detail with reference to FIGS. 3 to 6. These modifications are merely to illustrate the invention, but the invention is not limited thereto.

3 is a partially exploded perspective view of a flat panel display device according to a second exemplary embodiment of the present invention, and illustrates a lower structure of the flat panel display device including the sub flat panel display panel 300. In the flat panel display device according to the second embodiment of the present invention, the rest of the structure except for the lower portion of the flat panel display device shown in FIG. It is represented using a sign.

 As shown in FIG. 3, the flat panel display device according to the second embodiment of the present invention is attached around the opening 3721 of the bottom chassis 372 to support and support the secondary flat panel display panel 300. It further includes. The support 380 has a frame shape in which the sub flat panel display panel 300 receives a light emitted from the inside of the flat panel display device so that an image is displayed. Various types of locking portions 3801, 3803, and 3807 are formed on side surfaces of the support 380, and are fixed to the locking portions 3743 and 3728 formed by bending around the opening 3721 of the bottom chassis 372. A seating portion 3927 is formed around the opening 3721 of the bottom chassis 372 to be seated and fixed by mounting the support 380 coupled to the bottom chassis 372. As described above, according to the second embodiment of the present invention, the secondary flat panel display panel 300 is fixed after the support 380 is fixed to the bottom chassis 372 and thus the secondary flat panel display panel 300 can be firmly fixed. There is this.

Meanwhile, a tape 374 is attached along the periphery of the opening 3721 of the bottom chassis 372 to seal around the opening 3721 of the bottom chassis 372. The tape 374 is also attached to the engaging portions 3726, 3727, and 3728 (reference numeral 3726 is shown in FIG. 4) and the seating portion 3729 formed around the opening 3721 of the bottom chassis 372 to prevent foreign matter from Prevent intrusion The tape 374 may be made of, for example, a resin film or the like.

4 is a partially coupled perspective view of a flat panel display device according to a second exemplary embodiment of the present invention. The bottom chassis 372, the sub flat panel display panel 300, the support 380, and the non-conductive member 363 illustrated in FIG. 3 are illustrated. ) Is shown, and then rotated 180 ° along the Y-axis direction.

As shown in FIG. 4, the locking portion 3801 formed on the side of the support 380 is fixedly coupled to the locking portion 3726 formed along the circumference of the bottom chassis 372. Accordingly, when the secondary flat panel display panel 300 is fixed to the support 380, the structure of the flat panel display device may be firmly overall.

In particular, since a tape 374 (dotted line) is attached around the opening of the bottom chassis 372 to seal the periphery of the opening of the bottom chassis 372, the foreign matter P from the outside is displayed on the flat plate as shown by the arrow. It will not be able to enter the inside of the device. As a result, durability of the flat panel display device can be improved, and an operation failure of the flat panel display device due to foreign matter can be prevented in advance.

5 is a partially exploded perspective view of a flat panel display device according to a third exemplary embodiment of the present invention, and illustrates a lower structure of the flat panel display device including the sub flat panel display panel 300. In the flat panel display device according to the third embodiment of the present invention, the rest of the structure except for the lower portion of the flat panel display device shown in FIG. 5 is the same as the first embodiment of the present invention. It is represented using a sign.

The flat panel display device according to the third exemplary embodiment of the present invention includes a mold frame 346 surrounding the side surface of the backlight assembly and having an opening 3541 formed therein. The support part 3403 is protruded in a downward direction around the opening 3541 of the mold frame 346 and is fixedly coupled to the bottom chassis 382 by penetrating through the opening 3811 of the bottom chassis 382. Although FIG. 5 shows that the support part 3403 is formed only on the left side of the opening part 3651 of the mold frame 346, the support part is formed along the periphery of the opening part of the mold frame 346. Fixedly coupled. In addition, a support portion 3831 is formed around the opening portion 3821 of the bottom chassis 382, and is in close contact with the support portion of the mold frame 346.

The support part 3403 which penetrates the opening 3811 of the bottom chassis 382 fixes and supports the sub flat panel display panel 300. Therefore, there is an advantage that can be firmly fixed to the secondary flat panel display panel 300 without using a separate component.

The tape 384 is attached along the perimeter of the opening 3811 of the bottom chassis 382 to seal around the opening 3831 of the bottom chassis 382 in contact with the mold frame 346. The tape 384 may be formed of, for example, a resin film, and serves to prevent intrusion of foreign matter that can penetrate into the inside of the flat panel display device through the opening 3827.                     

FIG. 6 is a partially bonded perspective view of a flat panel display device according to a third exemplary embodiment of the present invention. The mold frame 346, the bottom chassis 382, the non-conductive member 363, and the optical sheet 342b shown in FIG. 5 are shown. And after the sub-flat display panel 300 is fully coupled, the view is rotated by 180 ° with respect to the Y-axis.

As shown in FIG. 6, the bottom chassis 382 includes a support 3831 formed around an opening 3811 (shown in FIG. 5, hereinafter same). Here, the support 3827 of the bottom chassis 382 surrounds and fixes the support 3635 protruding from the mold frame 346. Accordingly, since the mold frame 346 is firmly coupled to the bottom chassis 382, the secondary flat panel display panel 300 may be firmly fixed while increasing durability of the flat panel display device.

In addition, since a tape 384 (dotted line) is attached around the opening 3811 of the bottom chassis 382, the foreign matter P is prevented from entering the flat panel display device from the outside as indicated by the arrow. . As a result, malfunctions of the flat panel display due to the intrusion of foreign matters such as a short circuit can be blocked.

As described above, the present invention has an advantage of improving the durability of the flat panel display device by preventing the intrusion of foreign substances from the outside through a simple method.

As described above, since the flat panel display device according to the present invention seals around the opening of the bottom chassis, there is an advantage of preventing the malfunction of the flat panel display device in advance by preventing the inflow of liquid foreign matter from the outside.

The flat panel display panel is fixedly supported by a support formed in the bottom chassis, thereby minimizing structural changes, thereby reducing the weight and volume of the flat panel display device.

In addition, by attaching a tape to seal the perforated portion of the bottom chassis to prevent foreign matter from entering from the outside, it can contribute to improving the display quality of the flat panel display.

The flat panel display device according to the present invention may further include a support to firmly support the flat panel display panel.

Since the locking portion formed on the side of the support is fixedly coupled to another locking portion bent along the opening of the bottom chassis, the support is firmly coupled to the bottom chassis and there is no risk of flowing by external impact.

By attaching a tape along the periphery of the opening of the bottom chassis to seal the periphery of the opening of the bottom chassis in contact with the backlight assembly, it is possible to ultimately improve durability of the flat panel display by preventing foreign matter from invading from the outside.

The flat panel display according to the present invention further includes a mold frame having an opening, and since the mold frame fixes and supports the flat panel display panel while penetrating the opening of the bottom chassis, the flat panel display panel can be firmly fixed and supported without a separate component. It is possible to minimize the volume of the flat panel display device.

The bottom chassis includes another support bent along the opening to surround and secure the support of the mold frame, so that the bottom chassis can be tightly coupled with the mold frame.                     

A tape may be attached along the periphery of the opening of the bottom chassis in contact with the mold frame to prevent inflow of foreign matter from the outside into the flat panel display.

Since at least one of the flat panel display panels is a liquid crystal display panel, high resolution can be realized even in a small flat panel display device.

The flat panel display device can be used for a mobile phone, so it can be used to minimize the volume.

Although the present invention has been described above, it will be readily understood by those skilled in the art that various modifications and variations are possible without departing from the spirit and scope of the claims set out below.

Claims (11)

At least two flat panel displays, A backlight assembly supplying light to the flat panel display panel, and A bottom chassis accommodating the backlight assembly and having an opening for exposing at least one flat panel of the flat panel to the outside. Including, And a flat panel sealing device around the opening of the bottom chassis. In claim 1, And the bottom chassis includes a support portion bent by cutting a portion around the opening, and the support portion is adjacent to a side surface of the flat panel display panel to fix and support the flat panel display panel. In claim 2, And a tape attached to the perforation portion to seal the perforation portion of the bottom chassis formed by bending the support portion. In claim 1, And a supporter attached to an opening of the bottom chassis to fix and support at least one flat panel display panel among the flat panel display panels. In claim 4, And a locking portion formed on a side surface of the supporter is fixedly coupled to another locking portion bent along an opening of the bottom chassis. In claim 5, And a tape attached around the opening of the bottom chassis to seal around the opening of the bottom chassis in contact with the backlight assembly. In claim 1, And a mold frame surrounding the side surface of the backlight assembly and having an opening formed therein, And a support part protrudingly formed around the opening of the mold frame to penetrate the opening of the bottom chassis to be fixedly coupled to the bottom chassis, wherein the support part fixes and supports at least one flat panel display panel among the flat panel display panels. In claim 7, And the bottom chassis includes another support portion bent along an opening of the bottom chassis to surround and fix the support portion of the mold frame. In claim 7, And a tape attached around the opening of the bottom chassis to seal around the opening of the bottom chassis in contact with the mold frame. In claim 1, And at least one of the flat panel display panels is a liquid crystal display panel. In claim 1, The flat panel display device is a flat panel display device for a cell phone (celluar phone).

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