KR20060013150A - A liquid crystal display for preventing particles from infiltrating - Google Patents

Abstract

The present invention relates to a liquid crystal display device for preventing the intrusion of foreign matter. To this end, the liquid crystal display device according to the present invention includes a liquid crystal display panel for displaying an image, a mold frame positioned at a lower portion of the liquid crystal display panel to support the liquid crystal display panel, and supplying light to the liquid crystal display panel and to a lower portion of the mold frame. And a backlight assembly having the mold frame fixedly coupled thereto, wherein the chargeable member is fixed between at least one of the liquid crystal display panel and the mold frame and between the mold frame and the backlight assembly. Through the present invention, it is possible to prevent the internal parts of the liquid crystal display from being damaged.

Chargeable Member, Foreign Material, Static Electricity, Mold Frame

Description

Liquid crystal display to prevent intrusion of foreign substances {A LIQUID CRYSTAL DISPLAY FOR PREVENTING PARTICLES FROM INFILTRATING}

1 is an exploded perspective view of a liquid crystal display according to a first embodiment of the present invention.

2 is a perspective view illustrating a liquid crystal display 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 a partial cross-sectional view taken along line BB of FIG. 2.

5 is a partial cross-sectional view of a liquid crystal display according to a second exemplary embodiment of the present invention.

The present invention relates to a liquid crystal display device for preventing the intrusion of foreign matters, and more particularly to a liquid crystal display device for preventing damage to the internal components by preventing foreign matters from entering the liquid crystal display device.

With the recent rapid development of semiconductor technology, the demand for liquid crystal display devices having improved performance while being smaller and lighter is exploding.

Recently, liquid crystal displays (LCDs), which have been in the spotlight, have advantages such as miniaturization, light weight, and low power consumption, and as an alternative means to overcome the disadvantages of the conventional cathode ray tube (CRT). It has been attracting attention gradually and is currently used in almost all information processing devices that require a 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 light-receiving display device which converts into a change and displays information using the modulation of the light by a liquid crystal cell.

The liquid crystal display device is supplied to consumers after final inspection after assembling the liquid crystal display panel. Foreign matter that penetrates into the liquid crystal display during the manufacturing process of the liquid crystal display remains at the edges or other portions of the backlight assembly, and the liquid crystal display panel flows or is impacted during the transportation and distribution process. Flows. As described above, the foreign matter flowing in the liquid crystal display device has a problem of damaging the polarizing plate or the optical sheet attached to the lower portion of the liquid crystal display panel.

In order to solve this problem, the gap between the liquid crystal display panel and the optical sheet is minimized to minimize the damage caused by the flow of foreign matter inside the liquid crystal display, but the size of the foreign matter is so minute that it is already limited in preventing damage. There is an early issue.

 SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a liquid crystal display device having a structure capable of blocking an invasion of foreign matters.

The liquid crystal display device according to the present invention for achieving the above object is a liquid crystal display panel for displaying an image, a mold frame (mold frame) for supporting the liquid crystal display panel is located below the liquid crystal display panel, and the liquid crystal display panel And a backlight assembly configured to supply light and be positioned below the mold frame to fix the mold frame, and to the at least one of the liquid crystal display panel and the mold frame and between the mold frame and the backlight assembly. .

Here, the chargeable member may be fixed between the liquid crystal display panel and the mold frame.

And the charging member is preferably extended to cover the upper surface of the mold frame.

In the mold frame, the liquid crystal display panel and the backlight assembly are spaced apart from each other, and the chargeable member is preferably attached to a surface of the mold frame opposite to the space formed by the mold frame.

An elastic member is attached to the upper portion of the mold frame to support the liquid crystal display panel, and the chargeable member is fixed between the liquid crystal display panel and the elastic member.

Here, it is preferable that an elastic member consists of rubber | gum.

The chargeable member may be fixed between the mold frame and the backlight assembly.                     

The backlight assembly includes an optical sheet for increasing the brightness of light, and a chargeable member may be fixed between the mold frame and the optical sheet.

The chargeable member is preferably attached to the mold frame.

Here, the chargeable member may be made of synthetic fiber or plastic.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 5. 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 liquid crystal display device 100 according to a first embodiment of the present invention, and includes a liquid crystal display device 100 including an upper mold frame 10, which is a mold frame to which a chargeable member 101 is attached. The figure which shows. The structure of the liquid crystal display shown in FIG. 1 is merely for illustrating the present invention, and the present invention is not limited thereto. Therefore, the present invention can also be applied to liquid crystal display devices having other structures.

The liquid crystal display device 100 according to the first embodiment of the present invention shown in FIG. 1 includes a backlight assembly 70 that supplies light and a liquid crystal display panel assembly 40 that displays an image corresponding to the light. Is done. In addition, the top chassis 60, the upper mold frame 10, the bottom chassis 62, and the lower mold frame 64 are combined to fix and support them. have.

The backlight assembly 70 supplies light to the liquid crystal display panel assembly 40 and guides the light to improve brightness, and the liquid crystal display panel assembly 40 positioned on the backlight assembly 70 displays an image. Control panel 50.                     

The liquid crystal display panel assembly 40 includes a liquid crystal display panel 50, a tape carrier package (TCP) 42, and a printed circuit board (PCB) 44. The liquid crystal display panel 50 includes a TFT substrate 51 composed of a plurality of TFTs (thin film transistors), a color filter substrate 53 positioned on the TFT substrate 51, and a liquid crystal (injected therebetween). Not shown).

The TFT substrate 51 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 PCB 44 to the data lines and the gate lines of the liquid crystal display panel 50 described above, electrical signals are input to the source and gate terminals of the TFTs, and the TFTs are input according to the input of these electrical signals. Is turned on or turned off, and an electrical signal necessary for pixel formation is output to the drain terminal.

On the other hand, the color filter substrate 53 is disposed thereon opposite the TFT substrate 51. The color filter substrate 53 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 this electric field, the arrangement angle of the liquid crystal injected between the TFT substrate 51 and the color filter substrate 53 is changed, and the light transmittance is changed according to the changed arrangement angle to obtain a desired pixel. Polarizers 511 and 531 (shown in FIG. 3) are attached to the lower portion of the TFT substrate 51 and the upper portion of the color filter substrate 53 to linearly polarize visible light.

The PCB 44 in which elements for driving the liquid crystal display panel 50 are mounted includes a data signal, a gate driving signal, and a plurality of signals for applying the signals at a proper time. The timing signals are generated, and the gate driving signal and the data driving signal are applied to the gate line and the data line of the liquid crystal display panel 50, respectively. The TCP 42 interconnects the TFT substrate 51 and the PCB 44 and determines when to apply the data drive signal and the gate drive signal.

The backlight assembly 70 is provided below the liquid crystal display panel assembly 40 to provide uniform light to the liquid crystal display panel assembly 40.

The backlight assembly 70 is accommodated and fixed on the bottom chassis 62. The backlight assembly 70 receives the light emitted from the lamp 72 and the lamp 72, which are light sources installed on both sides of the bottom chassis 62, and the liquid crystal display panel 50. A light guide plate 74 that guides the light guide plate, a reflective sheet 78 positioned at the lower front surface of the light guide plate 74 to reflect light emitted from the lamp 72, and wrapped around the lamp 72 to protect the coating material. And a lamp cover 73 for reflecting light emitted from the lamp 72, and an optical sheet 76 for increasing the luminance of the light supplied from the lamp 72 to the liquid crystal display panel 50. Here, the lamp is merely for illustrating the light source of the present invention, the light source is not limited thereto. Therefore, a light emitting diode (LED) may be used in addition to the lamp, and a light emitting body consisting of a linear light source or a surface light source may be used.                     

The liquid crystal display device 100 according to the first exemplary embodiment of the present invention shown in FIG. 1 includes a top chassis 60 and an upper mold frame to fix and support the liquid crystal display panel assembly 40 and the backlight assembly 70. a mold frame 10, a bottom chassis 62, and a lower mold frame 64. The upper mold frame 10 is positioned under the liquid crystal display panel 50 to support the liquid crystal display panel 50, and is fixedly coupled to the backlight assembly 70 positioned under the liquid crystal display panel 50. The lower mold frame 64 fixes the PCB 44 bent to the outer side of the upper mold frame 10. The top chassis 60 is formed on the liquid crystal display panel assembly 40 to prevent the liquid crystal display panel assembly 40 from being separated from the bottom chassis 62 while bending the PCB 44 to the outside of the upper mold frame 10. Equipped.

An inverter board (not shown), which is a power supply PCB, and a signal conversion PCB (not shown) are installed on the bottom of the bottom chassis 62. The inverter board transforms an external power supply to a constant voltage level to provide the lamp 72, and the signal conversion PCB is connected to the PCB 44 described above to convert analog data signals into digital data signals and to convert the liquid crystal display panel 50 into a digital signal. To provide. The inverter board and signal conversion PCB are covered and protected by a shield case (not shown).

Although not shown in FIG. 1, a front case and a rear case are positioned at an upper portion of the top chassis 60 and a lower portion of the bottom chassis 62, respectively, to form a liquid crystal display device 100 by combining them.

As shown in FIG. 1, the conductive member 101 is attached to the upper mold frame 10 to prevent foreign matter from entering the liquid crystal display device 100. The formation form of such an electroconductive member is only for illustrating the preferable this invention, This invention is not limited to this. Therefore, a conductive member can be formed also in another form.

 FIG. 2 is a perspective view of a liquid crystal display device 100 according to a first embodiment of the present invention, in which respective components of the liquid crystal display device 100 shown in FIG. 1 are combined.

Since the liquid crystal display device 100 according to the first exemplary embodiment of the present invention shown in FIG. 2 includes the upper mold frame 10 (shown in FIG. 1) having the structure described above, foreign matters can be seen from the outside. Intrusion into the interior can be prevented.

3 is a cross-sectional view taken along line AA of FIG. 2, and illustrates an internal cross section of the liquid crystal display 100 illustrated in FIG. 2 taken along the Y-axis direction.

The chargeable member 101 is fixed to at least one of the liquid crystal display panel 50 and the upper mold frame 10 and between the upper mold frame 10 and the backlight assembly 70. In FIG. 3, the chargeable member 1011 is fixed between the liquid crystal display panel 50 and the upper mold frame 10, and the chargeable member 1013 is also disposed between the upper mold frame 10 and the backlight assembly 70. Although shown as being fixed, this is merely to illustrate the invention and the present invention is not limited thereto. Therefore, the charging member may be fixed to at least one of the two.

Regardless of the gap between the liquid crystal display panel 50 and the backlight assembly 70, the charged members 1011 and 1013 charged by the electrostatic effect are fixed, so that foreign matter does not penetrate into the liquid crystal display and is charged. Dust is collected in the members 1011 and 1013. This is shown in more detail in the enlarged circle of FIG.

As shown in the enlarged circle of FIG. 3, in the case where the foreign matter 14 existing outside the liquid crystal display device penetrates into the liquid crystal display device, charging is fixed between the mold frame 10 and the polarizing plate 511. The foreign material 14 is attached to the static member 1011 by static electricity. As the chargeable member 1011, synthetic fibers or plastics made of polyester, polyvinyl chloride (PVC), cellophane, or the like are used. By using the chargeable member 1011 of such a material, not only generates the static electricity to which the foreign matter 14 can be attached well, but also the charged state can be maintained for a considerably long time. In general, even if the size of the foreign matter is much smaller than this ions are abundantly present in the foreign matter, the discharge power of the foreign matter is excellent. Therefore, it is possible to easily collect the foreign matter by using a chargeable member made of a material that is easy to generate static electricity.

In the liquid crystal display according to the first exemplary embodiment of the present invention illustrated in FIG. 3, the chargeable member 1015 is extended to cover the top surface of the upper mold frame 10. As described above, since the chargeable member 1015 covers the upper surface of the upper mold frame 10, the foreign matter 14 penetrating between the liquid crystal display panel 50 and the mold frame 10 is collected to the inside of the liquid crystal display device. Intrusion can be blocked at source.

FIG. 4 is a partial cross-sectional view taken along the line BB of FIG. 2, and the liquid crystal display shown in FIG. 2 is cut along the X-axis direction to show an internal cross section thereof.

As shown in FIG. 4, the electrostatic member 1013 is fixed between the upper mold frame 10 and the optical sheet 76, and the foreign material is collected by the electrostatic member 1013, thereby causing the optical sheet 76 to be foreign matter. Can be prevented in advance. In particular, in the case of the optical sheet 76, since the luminance of the light supplied from the lamp is improved and supplied to the liquid crystal display panel, there is an advantage in that the display quality of the liquid crystal display jacket is continuously maintained satisfactorily by maintaining good luminance.

On the other hand, the upper mold frame 10 is spaced apart from the liquid crystal display panel 50 and the backlight assembly 70, the chargeable member 1017 is attached to the surface facing the space formed by the separation of the upper mold frame 10 can do. Accordingly, even when foreign matter enters the gap between the liquid crystal display panel 50 and the backlight assembly 70, since the foreign matter is attached to the chargeable member 1017 by the static electricity of the chargeable member 1017, the liquid crystal display panel 50 is used. And damage to the backlight assembly 70 can be prevented in advance.

In addition, through the liquid crystal display device which can prevent foreign matter from invading, it is possible not only to prevent the damage of the parts inside the liquid crystal display device due to the foreign matter, but also to prevent the damage of the optical sheet and the polarizing plate. By securing, there is an advantage that ultimately good display quality can be obtained.

FIG. 5 is a partial cross-sectional view of the liquid crystal display according to the second exemplary embodiment of the present invention, and is a cross-sectional view of the liquid crystal display according to the second exemplary embodiment of the present invention at the same position as the line AA of FIG. 2.

Since the liquid crystal display according to the second exemplary embodiment of the present invention is the same as the first exemplary embodiment of the present invention except for the elastic member 12, the same reference numerals are used for the same parts and detailed description thereof will be omitted. Hereinafter, a second embodiment of the present invention will be described based on the elastic member 12.

In the liquid crystal display according to the second exemplary embodiment of the present invention illustrated in FIG. 5, an elastic member 12 is attached to the upper mold frame 10 to support the liquid crystal display panel 50. Accordingly, there is no risk that the liquid crystal display panel 50 may be damaged by the upper mold frame 10 due to the buffering force of the elastic member 12 even when an impact is applied to the liquid crystal display from the outside. In this case, a rubber may be used as the elastic member 12. Rubber is suitable for use because it is easy to obtain the material and inexpensive. The chargeable member 2011 is fixed between the liquid crystal display panel 10 and the elastic member 12 to prevent foreign matter from entering the liquid crystal display device.

As described above, in the liquid crystal display according to the second exemplary embodiment of the present invention, an elastic member is attached to the upper mold frame 10 to prevent foreign substances from entering the inside of the liquid crystal display while minimizing external impact.

As described above, in the liquid crystal display device according to the present invention, the chargeable member is fixed between at least one of the liquid crystal display panel and the mold frame and between the mold frame and the backlight assembly. The foreign matter can be prevented from penetrating into the liquid crystal display device. In addition, since there is less need to adjust the gap between the liquid crystal display panel and the backlight assembly, the design constraints on the structure of the liquid crystal display device are reduced.                     

In particular, since the chargeable member is fixed between the liquid crystal display panel and the mold frame, a large amount of foreign matter existing on the upper part of the mold frame can be more effectively prevented from entering the inside of the liquid crystal display device.

Since the chargeable member extends to cover the upper surface of the mold frame, the chargeable member is spread over a large area, thereby preventing the foreign matter from infiltrating into the liquid crystal display.

In addition, since the chargeable member is attached to the surface of the mold frame facing the spaced apart space, foreign matter invading into the liquid crystal display device can be finally blocked.

Since the elastic member is attached to the upper part of the mold frame to support the liquid crystal display panel, the elastic member buffers against external shock, so that the liquid crystal display panel is less likely to be damaged by the mold frame.

Here, since the elastic member may be made of rubber, it is easy to obtain a material and has an advantage of low cost.

The chargeable member may be fixed between the mold frame and the backlight assembly to prevent foreign matter from entering the lower portion of the mold frame.

In particular, since the chargeable member is fixed between the mold frame and the optical sheet to prevent damage to the optical sheet due to the intrusion of foreign matter, there is an advantage in that it is possible to continuously maintain good luminance ultimately.

Since the chargeable member can be used by being attached to a mold frame instead of a liquid crystal display panel or a backlight assembly, the chargeable member can be easily manufactured.

Synthetic fibers or plastics can be used as the chargeable member, so it is easy to obtain a material and has a low cost.

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)

Liquid crystal display panel for displaying an image, A mold frame positioned below the liquid crystal display panel to support the liquid crystal display panel; A backlight assembly which supplies light to the liquid crystal display panel and is positioned below the mold frame to fix the mold frame. Including, And a chargeable member fixed to at least one of the liquid crystal display panel and the mold frame and between the mold frame and the backlight assembly. In claim 1, And a chargeable member fixed between the liquid crystal display panel and the mold frame. In claim 2, And the chargeable member extends to cover an upper surface of the mold frame. In claim 2, And the mold frame is spaced apart from each other by the liquid crystal display panel and the backlight assembly, and a chargeable member is attached to a surface of the mold frame facing the space formed by the separation. In claim 2, And an elastic member attached to an upper portion of the mold frame to support the liquid crystal display panel, wherein a chargeable member is fixed between the liquid crystal display panel and the elastic member. In claim 5, The elastic member is a liquid crystal display device made of rubber. In claim 1, And a chargeable member fixed between the mold frame and the backlight assembly. In claim 7, And the backlight assembly includes an optical sheet for increasing the brightness of the light, and a chargeable member is fixed between the mold frame and the optical sheet. In claim 1, And a chargeable member attached to the mold frame. In claim 1, And the chargeable member is made of synthetic fiber or plastic.

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