KR20060032397A - A flat display device - Google Patents

Abstract

The present invention relates to a flat panel display. The flat panel display device according to the present invention includes a flat panel display panel, a backlight assembly for supplying light to the flat panel display panel, a bottom chassis for housing the backlight assembly, and a top chassis covering the periphery of the flat panel display panel. Here, the sum of the thicknesses of the respective side surfaces of the bottom chassis and the top chassis co-located in one direction is substantially equal to the distance from the inner surface of the bottom chassis to the outer surface of the top chassis. Through the present invention, it is possible to improve the strength of the flat panel display.

Flat Panel Display, Strength, Bottom Chassis, Top Chassis, Thickness

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 perspective view illustrating a flat panel display device according to a first exemplary embodiment of the present invention.

3 is a partial cross-sectional view taken along line AA of FIG. 2.

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

5 is a perspective view illustrating a flat panel display device according to a second exemplary embodiment of the present invention.

FIG. 6 is a partial cross-sectional view taken along line BB of FIG. 5.

The present invention relates to a flat panel display device, and more particularly, to a flat panel display device having improved strength by improving side structures.

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 the mobile phones are mostly manufactured in the form of a folder for the convenience of the user, a dual flat panel display device having two flat panel display panels respectively attached to the front and rear surfaces of the mobile phone folder unit is widely used.

Since such a dual flat panel display is commonly used in portable mobile phones, it is necessary to manufacture a structure that can minimize the impact when the mobile phone falls. In such a flat panel display device, since the chassis is typically made of sus (stainless steel, stainless steel), and thus has a relatively high strength, the flat panel display panel is used to protect a glass flat panel that is susceptible to impact. Therefore, in the flat panel display device for mobile phones, in order to protect the flat panel display panel and the backlight assembly from external impact while minimizing its size, a thick mold frame and a thinner chassis are generally used. It is prepared by combining with each other.

However, even when manufactured in this way, since the mold frame is usually formed of plastic, etc., it is not only susceptible to external shock but also has a problem in that the thickness of the chassis is thin so that the desired strength of the flat panel display device cannot be obtained. Therefore, a mobile phone using the flat panel display device manufactured as described above has a problem in that it is accidentally dropped on the ground and broken.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problem, and an object of the present invention is to provide a flat panel display device having improved strength by changing a structure of a chassis.

The flat panel display device according to the present invention includes a flat panel display panel, a backlight assembly for supplying light to the flat panel display panel, a bottom chassis for housing the backlight assembly, and a top chassis covering the periphery of the flat panel display panel. Here, the sum of the thicknesses of the bottom chassis and each side thickness of the top chassis which are co-located in one direction is substantially the same as the distance from the inner side of the bottom chassis to the outer side of the top chassis.

Here, the outer surface of the bottom chassis is preferably surrounded by the inner surface of the top chassis.

In addition, the flat panel display device according to the present invention further includes a mold frame surrounding the circumference of the backlight assembly, and the outer surface of the mold frame is preferably adjacent to the inner surface of the bottom chassis.

Here, the thickness of the mold frame, the side thickness of the top chassis and the side thickness of the bottom chassis are preferably substantially the same.

Another flat panel display device according to the present invention includes a flat panel display panel, a backlight assembly for supplying light to the flat panel display panel, a bottom chassis for housing the backlight assembly, and a top chassis covering the periphery of the flat panel display panel. Here, the sum of the thicknesses of the respective side surfaces of the bottom chassis and the top chassis co-located in one direction is substantially the same as the distance from the inner surface of the top chassis to the outer surface of the bottom chassis.

Here, the outer surface of the top chassis is preferably surrounded by the inner surface of the bottom chassis.

Further, another flat panel display according to the present invention further includes a mold frame surrounding the backlight assembly, and the outer surface of the mold frame is preferably adjacent to the inner surface of the top chassis.

Here, the thickness of the mold frame, the side thickness of the top chassis, and the side thickness of the bottom chassis are preferably substantially the same.

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.

1 is an exploded perspective view of a flat panel display device 100 according to a first embodiment of the present invention, in which the flat panel display device 100 including the main flat panel display panel 200 and the sub flat panel display panel 300 is disassembled. The figure shown. 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 the flat panel display device according to the first embodiment of the present invention. It is merely to illustrate the structure and arrangement of the flat panel display device according to the present invention and 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, one or three or more flat panel display panels may be included. In addition, although FIG. 1 shows two liquid crystal display panels facing each other as the flat panel display panels 200 and 300, this is merely to exemplify a 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 (thin film transistor) 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 terminal is connected to a gate terminal. The gate line is connected. 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, other light sources such as a lamp can be used as the light source, and a linear light source and a surface light source in which the light emitting diodes are modularized can also be used. 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. In particular, the mold frame 336 wraps around the backlight assembly 900. 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. The top chassis 361 covers the periphery of the main flat panel display panel 200, and 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. A tape 364 is attached around the opening 3621 of the bottom chassis 362 to prevent foreign matter from entering through the opening 3621.

In the present invention, the top chassis 361 and the bottom chassis 362 are overlapped with each other to form the outside of the flat panel display 100, thereby improving the strength of the flat panel display 100. Hereinafter, the structure of the flat panel display device according to the first embodiment of the present invention will be described in detail with reference to FIG. 2.

FIG. 2 is a perspective view illustrating a flat panel display device 100 according to a first embodiment of the present invention in which all internal components of the flat panel display device 100 shown in FIG. 1 are combined.

As shown in FIG. 2, the top chassis 361 covers the entire side surface of the bottom chassis 362 (shown in FIG. 1, hereinafter same). Due to the structure, the top chassis 361 and the bottom chassis 362 are doublely installed on the side surface even when the flat panel display 100 is impacted from the outside, and thus the flat panel display 100 is not damaged by alleviating the impact. Do not. Hereinafter, the internal structure of the flat panel display 300 will be described in more detail with reference to FIG. 3.

3 is a partial cross-sectional view taken along line AA of FIG. 2 and illustrates an internal structure of the flat panel display device 100 according to the first embodiment of the present invention.

As shown in FIG. 3, the inner side 361b of the top chassis 361 is surrounded by the outer side 362a of the bottom chassis 362. In the first embodiment of the present invention, the outer surface 336a of the mold frame 336 is not exposed to the outside of the flat panel display device 100, and the top chassis 361 and the bottom chassis 362 having a relatively high strength as a sus material. ) Surrounds the side surface of the flat panel display 100, the flat panel display 100 is resistant to external impact.                     

According to this structure, the sum of the side thickness W _b1 of the bottom chassis 362 and the side thickness W _t1 of the top chassis 361 that are located together in one direction, that is, in the X-axis direction, is equal to the inside of the bottom chassis 362. It is substantially equal to the distance from the side surface 362b to the outer surface 361a of the top chassis 361. That is, the distance between the two is the same or close.

In particular, in the first embodiment of the present invention, the side thickness W _t1 of the top chassis 361 and the side thickness W _b1 of the bottom chassis 362 are made thicker to improve the strength of the flat panel display. Therefore, the side thickness W _t1 of the top chassis 361 and the side thickness W _b1 of the bottom chassis 362 are substantially the same as the thickness W _m of the mold frame 336, and are formed slightly thicker. do. That is, the thickness is formed to be the same or close to both.

In this way, even if the side surfaces of the top chassis 361 and the bottom chassis 362 forming the side of the flat panel display device 100 are made slightly thick, the mold frame 336 belonging to the thick side of the flat panel display device 100 is thick. Since the inside of the flat panel display apparatus 100 is not exposed to the outside of the flat panel display apparatus 100, the overall size of the flat panel display apparatus is similar to the past. Therefore, while maintaining the flat panel display device with the same size as before, the strength can be greatly improved compared to the past.

Hereinafter, the flat panel display according to the second exemplary embodiment of the present invention will be described with reference to FIGS. 4 to 6. 4 to 6 are the same as those of the flat panel display according to the first embodiment of the present invention except for the top chassis and the bottom chassis, and thus, the same parts will be described. The same reference numerals are used and detailed description thereof will be omitted.

4 is an exploded perspective view of a flat panel display device 400 according to a second embodiment of the present invention, in which the flat panel display device 400 including the main flat panel display panel 200 and the sub flat panel display panel 300 is disassembled. The figure shown.

As shown in FIG. 4, a locking portion 4611 is protruded from one side surface of the top chassis 461 to be inserted and fixed to the locking groove 4641 of the bottom chassis 462. Therefore, the top chassis 461 is structured to be housed inside the bottom chassis 462. In the case of such a structure, in the past, the locking groove 4641 is formed on the side surface of the bottom chassis 462 to be coupled to the mold frame, and thus, the locking portion 4611 may be simply formed on the side surface of the top chassis 461. . Accordingly, the flat panel display device 400 shown in FIG. 4 can be manufactured by only slightly modifying the current manufacturing equipment, which is flexible in terms of process.

FIG. 5 is a perspective view illustrating a flat panel display device 400 according to a second embodiment of the present invention in which all internal components of the flat panel display device 400 shown in FIG. 4 are combined.

As shown in FIG. 5, since the side surfaces of the flat panel display device 400 include the top chassis 461 and the bottom chassis 462, the flat panel display device 400 may be impacted even when the flat panel display device 400 is impacted from the outside. ) Is not easily broken. In addition, since the locking portion 4611 protruding from the side of the top chassis 461 is fixedly coupled to the locking groove 4641 formed in the bottom chassis 462, the top chassis 461 and the bottom chassis 462 are firmly assembled. They are not separated from each other.

6 is a partial cross-sectional view taken along the line BB of FIG. 5 and illustrates an internal structure of the flat panel display device 400 according to the second embodiment of the present invention.

As shown in FIG. 6, the outer surface 461a of the top chassis 461 is surrounded by the inner surface 462b of the bottom chassis 462. As described above, in the second embodiment of the present invention, the mold frame 336 is not exposed to the outside of the flat panel display 400, and the outer surface 336a is adjacent to the inner surface 461b of the top chassis 461. Is protected. Instead, the side surface of the flat panel display device 400 is sus made of a bottom chassis 462 and a top chassis 461 with relatively high strength, and thus are resistant to external shocks.

According to such a structure, the sum of the side thickness W _b2 of the bottom chassis 462 and the side thickness W _t2 of the top chassis 461 which are located together in one direction, that is, in the X axis direction, is equal to the inside of the top chassis 461. It is substantially equal to the distance from the side surface 461b to the outer surface 462a of the bottom chassis 462. That is, the distance between the two is the same or close.

In particular, in the second embodiment of the present invention, the side thickness W _t2 of the top chassis 461 and the side thickness W _b2 of the bottom chassis 462 are made thicker, thereby improving the strength of the flat panel display 400. . Therefore, the side thickness W _t2 of the top chassis 461 and the side thickness W _b2 of the bottom chassis 462 are substantially the same as the thickness W _m of the mold frame 336 to be slightly thicker. do. That is, the thickness is formed to be the same or close to both.

Even though the top chassis 461 and the bottom chassis 462 which form side surfaces of the flat panel display device 400 are slightly thicker, the mold frame 336 belonging to the thicker side of the flat panel display device 400 The overall size of the flat panel display device is similar to that of the past, since it is not exposed to the outside and is included inside. Therefore, while maintaining the flat panel display device with the same size as before, the strength can be greatly improved compared to the past.

As described above, in the flat panel display according to the present invention, the sum of the thicknesses of the side surfaces of the bottom chassis and the top chassis, which are located together in one direction, is the distance from the inner surface of the bottom chassis to the outer surface of the top chassis or the top chassis. Since the distance from the inner side to the outer side of the bottom chassis is substantially the same, the side of the flat panel display can be formed as a chassis to improve the strength of the flat panel display.

In addition, a flat panel display having a structure resistant to external impact may be manufactured by surrounding the outer surface of the bottom chassis with the inner surface of the top chassis or the outer surface of the top chassis with the inner surface of the bottom chassis.

Since the outer surface of the mold frame is adjacent to the inner surface of the bottom chassis or the top chassis, by removing the mold frame from the side of the flat panel display device and including the inside of the flat display device, the overall size of the flat display device can be kept the same. .

Since the side thicknesses of the top chassis and the bottom chassis are substantially the same as the thickness of the mold frame, the thickness of the top chassis and the bottom chassis may be increased to provide a flat panel display device having improved strength.

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 (10)

Flat Panel, A backlight assembly supplying light to the flat panel display panel, A bottom chassis for receiving the backlight assembly, and A top chassis covering the periphery of the flat panel display panel Including, The sum of the thicknesses of each side surface of the bottom chassis and the top chassis which are located together in one direction is substantially the same as the distance from the inner surface of the bottom chassis to the outer surface of the top chassis. In claim 1, And an outer surface of the bottom chassis surrounded by an inner surface of the top chassis. In claim 1, The apparatus may further include a mold frame surrounding the backlight assembly. And an outer surface of the mold frame adjacent to an inner surface of the bottom chassis. In claim 3, And a thickness of the mold frame, a side thickness of the top chassis, and a side thickness of the bottom chassis are substantially the same. Flat Panel, A backlight assembly supplying light to the flat panel display panel; A bottom chassis for receiving the backlight assembly; Top chassis covering the flat panel Including, The sum of the thicknesses of the side surfaces of the bottom chassis and the top chassis, which are positioned together in one direction, is substantially equal to the distance from the inner surface of the top chassis to the outer surface of the bottom chassis. In claim 5, And an outer surface of the top chassis surrounded by an inner surface of the bottom chassis. In claim 5, In claim 1, The apparatus may further include a mold frame surrounding the backlight assembly. And an outer surface of the mold frame is adjacent to an inner surface of the top chassis. In claim 7, And a thickness of the mold frame, a side thickness of the top chassis, and a side thickness of the bottom chassis are substantially the same. The compound according to any one of claims 1 to 8, And at least one of the flat panel display panels is a liquid crystal display panel. The compound according to any one of claims 1 to 8, The flat panel display device is a flat panel display device for a cell phone (celluar phone).

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