KR20040102235A - Flat panel display device - Google Patents

Abstract

PURPOSE: An FPD(Flat Panel Display) is provided to change a combining structure so that the entire size of the apparatus is reduced, since there is no need to increase a side thickness of the apparatus in order to secure a combining space. CONSTITUTION: A display unit(600) and a backlight assembly(700) are fixed and supported by a mold frame(800), as a reception container of a kind, and combined and fixed to a combining hole formed to the bottom surface of a side wall of the mold frame by the first plural combining members(1005). The mold frame also has the second combining member made of metal for encompassing the outer wall of the combining hole. A top chassis(900) are provided on the display unit in order to prevent the display unit from separating.

Description

Flat panel display device

The present invention relates to a flat panel display, and more particularly, to a flat panel display for reducing the overall size by changing the fastening structure.

Recently, information processing devices have been rapidly developed to have various forms, various functions, and faster information processing speed. Information having an electrical signal form processed by such an information processing device requires a display device serving as an interface.

Recently, various flat panel display devices have been developed in comparison with CRT display devices, which are lightweight, compact, and have a function such as full-color and high resolution.

Generally, a liquid crystal display device, which is a leader of a flat panel display device, applies a voltage to a specific molecular array of a liquid crystal and converts it into another molecular array. A display device that displays an image by converting changes in optical properties such as chromaticity and light scattering characteristics into visual changes.

In general, a top mounting method and a side mounting method are used for fastening a liquid crystal display module and a case accommodating the liquid crystal display module.

However, the current mounting method is used in combination with the top mounting method and the side mounting method, and both models are increasing according to the user's product specifications.

FIG. 1 is an exploded perspective view illustrating a conventional liquid crystal display, and FIG. 2 is a cross-sectional view taken along the line AA ′ of FIG. 1.

1 and 2, the liquid crystal display 100 may include a display unit 170, a backlight assembly 160, a mold frame 132, a bracket 136, and a top chassis 140.

The display unit 176 includes a liquid crystal display panel 171 for displaying an image, a data side and gate side tape carrier package (TCP) 178, 174, and a data side printed circuit board and a gate side printed circuit. Substrates 175 and 176 are provided.

The liquid crystal display panel 171 is a liquid crystal injected between the thin film transistor substrate 172, the color filter substrate 173 facing the thin film transistor substrate 172, and the thin film transistor substrate 172 and the color filter substrate 173. Layer (not shown).

A driving signal and a timing signal are applied to the gate line and the data line of the thin film transistor in order to control the arrangement angle of the liquid crystals of the liquid crystal display panel 171 and the timing when the liquid crystals are arranged. That is, the data side printed circuit board 176 and the gate side printed circuit board 175 may include a plurality of gate driving signals, data signals, and signals for driving the liquid crystal display device 100 at a suitable time. The timing signals are generated and applied to the gate line and the data line of the liquid crystal display panel 171.

A backlight assembly is provided below the display unit to provide uniform light to the display unit. The light guide plate 152 has a size corresponding to that of the display unit and is positioned below the display unit to guide the light generated by the lamp toward the display unit to change the path of the light.

The mold frame 132 sequentially storing the backlight assembly and the display unit is received in the bracket 136.

The sidewall of the bracket 136 is formed with a groove 136a to which the fixing screw 180 is fastened. That is, the bracket is formed of a metal material to increase the bonding force has a groove for fixing to the side wall.

However, when the bracket is adopted, the side surface of the liquid crystal display device becomes longer by at least the width occupied by the bracket, and as a result, the length B to the outer surface of the side wall of the top chassis 140 becomes very long. For this reason, there arises a problem that the overall size of the liquid crystal display increases.

SUMMARY OF THE INVENTION An object of the present invention, which is proposed to solve the above-described problem, is to provide a flat panel display device for reducing the overall size by changing a fastening structure.

1 is an exploded perspective view showing a conventional liquid crystal display device.

2 is a cross-sectional view taken along the line A-A 'of FIG. 1.

3 is an exploded perspective view illustrating a liquid crystal display according to an exemplary embodiment of the present invention.

4 is a cross-sectional view taken along the cutting line BB ′ of FIG. 3.

5 is an enlarged schematic view of a coupling structure between the mold frame and the fastening member of FIG. 3.

<Explanation of symbols for the main parts of the drawings>

610: liquid crystal display panel 620: data printed circuit board

630: data tape carrier package 640: gate printed circuit board

650: gate tape carrier package 330: optical sheet

710: lamp 712: lamp cover

800: mold frame 800a: fastening hole

900: top chassis 1000: bottom chassis

800b: second fastening member 1005: first fastening member

According to an aspect of the present invention, there is provided a flat panel display including: a display unit configured to display an image; A fastening hole is formed in a bottom surface of the side wall, and a backlight assembly having a light source unit for generating light, and a mold frame receiving the light and sequentially receiving the display unit; It is fastened to the fastening hole, and includes a first fastening means having a screw thread for fixing the display unit and the mold frame.

According to such a flat panel display apparatus, a fastening hole may be provided on the rear surface of the flat panel display apparatus without using a bracket to reduce the overall size.

3 is an exploded perspective view illustrating a liquid crystal display according to an exemplary embodiment of the present invention.

Referring to FIG. 3, the liquid crystal display device 3000 includes a liquid crystal display module for displaying an image by applying an image signal and a case (not shown) for accommodating the liquid crystal display module. Here, the x-axis direction is the upward direction, and the y-axis direction is the downward direction.

The display unit includes a liquid crystal display panel 600, a data side printed circuit board 620, a gate side printed circuit board 640, a data side tape carrier package 630, and a gate side tape carrier package 650.

The liquid crystal display panel 612 includes a thin film transistor substrate 612, a color filter substrate 614, and a liquid crystal (not shown).

The thin film transistor substrate 612 is a transparent glass substrate on which a matrix thin film transistor is formed. A data line is connected to a source terminal of the thin film transistors, and a gate line is connected to a gate terminal of the thin film transistors. In addition, a pixel electrode made of indium tin oxide (ITO), which is a transparent conductive material, is formed in the drain terminal.

When electrical signals are input to the data lines and the gate lines, electrical signals are input to the source and gate terminals of the respective thin film transistors, and the thin film transistors are turned on or turned off according to the input of the electrical signals, thereby draining the drain terminals. The furnace outputs an electrical signal necessary for pixel formation.

The color filter substrate 614 is provided to face the thin film transistor substrate 612. The color filter substrate 614 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. The common electrode made of ITO is coated on the front surface of the color filter substrate 614.

When power is applied to the gate terminal and the source terminal of the transistor of the thin film transistor substrate 612 described above 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 such an electric field, the arrangement angle of the liquid crystal injected between the thin film transistor substrate 612 and the color filter substrate 614 is changed, and the light transmittance is changed according to the changed arrangement angle to obtain a desired pixel.

A driving signal and a timing signal are applied to the gate line and the data line of the thin film transistor in order to control the arrangement angle of the liquid crystal of the liquid crystal display panel 610 and the timing when the liquid crystal is arranged.

As shown in the drawing, a data tape carrier package 620, which is a type of a flexible printed circuit (FPC), is formed on the source side of the liquid crystal display panel 610 to determine when to apply the data driving signal. The gate tape carrier package 640 is attached to the side to determine the timing of applying the driving signal of the gate.

The data-side printed circuit board 620 and the gate-side printed circuit board 640 for receiving image signals from the outside of the liquid crystal display panel 610 and applying driving signals to the gate lines and the data lines, respectively, are the liquid crystal display panel 610. Are respectively connected to the data tape carrier package 630 on the data line side and the gate tape carrier package 650 on the gate line side. The data side printed circuit board 620 receives a video signal generated from an external information processing device (not shown) such as a computer, and has a source portion for providing a data driving signal to the liquid crystal display panel 610. The gate side printed circuit board 640 receives a video signal generated from an external information processing device (not shown) such as a computer, and provides a gate part for providing a gate driving signal to a gate line of the liquid crystal display panel 610. have.

That is, the data side printed circuit board 620 and the gate side printed circuit board 640 may include a gate driving signal, a signal for driving a liquid crystal display, a data signal, and a plurality of timing signals for applying these signals at an appropriate time. Generate. The gate driving signal is applied to the gate line of the liquid crystal display panel 610 through the gate tape carrier package 650, and the data signal is data of the liquid crystal display panel 610 through the data tape carry package 630. Is applied to the line.

A backlight assembly 700 is provided below the display unit 600 to provide uniform light to the display unit 600. The backlight assembly 700 includes a lamp 710 for generating light. The lamps 710 are each protected by a lamp cover 712.

The light guide plate 720 has a size corresponding to that of the liquid crystal display panel 610 of the display unit 600 and is positioned below the liquid crystal display panel 610 so that the light generated by the lamp 710 is directed toward the display unit 600. Change the path of the light while guiding.

A plurality of optical sheets 730 are provided on the light guide plate 720 to uniform the luminance of light emitted from the light guide plate 720 and directed toward the liquid crystal display panel 610. In addition, a reflector plate 740 is provided below the light guide plate 720 to increase light efficiency by reflecting light leaked from the light guide plate 720 to the light guide plate 720.

The display unit 600 and the backlight assembly 700 are fixedly supported by the mold frame 800, which is a kind of storage container, and are formed on the sidewalls of the mold frame 800 by a plurality of first fastening members 1005 fastened separately. It is fastened and fixed to the fastening hole formed in the bottom surface.

As will be described in detail later, to prevent cracking of the mold frame, which may occur when the first fastening member 1005 made of metal is fastened to the mold frame 800 made of plastic, the fastening hole may be used for more firm coupling. A second fastening member made of metal surrounding the outer wall is separately provided.

Here, in the liquid crystal display device according to the present invention, a bracket used in general site mounting is not used to fix the backlight assembly 700, and fastening holes are formed on the bottom surface of the sidewall of the mold frame 800.

In addition, on the display unit 600, the data side printed circuit board 620 and the gate side printed circuit board 640 are bent to the outside of the mold frame 800, and the bottom surface of the bottom chassis 1000 is formed. A top chassis 900 is provided to prevent the display unit 600 from being separated by fixing.

4 is a cross-sectional view taken along the cutting line BB ′ of FIG. 3, and FIG. 5 is a schematic diagram illustrating an enlarged coupling structure between the mold frame and the fastening member of FIG. 3.

Referring to FIG. 4, the bottom chassis 1000 accommodated in the storage space of the mold frame 800 includes the reflective plate 740, the light guide plate 720, the optical sheet 730, the thin film transistor substrate 612, and the color filter substrate. 614 is stored sequentially. In addition, the top chassis 900 is coupled to face the mold frame 800.

Here, the mold frame 800 has a fastening hole 800a formed on the bottom surface of the side wall, and a separate first fastening member 1005 is fastened to the fastening hole 800a.

In this case, the fastening holes 800a may be formed in plural on the sidewalls of the mold frame.

Meanwhile, referring to FIG. 5, the upper and lower sides of the x-axis direction and the y-axis direction illustrated in FIG. 3 are shown in reverse, and only the mold frame 800 and the first fastening member 1005 are illustrated.

The fastening hole 800a to which the first fastening member 1005 is fastened is formed on the bottom surface of the sidewall of the mold frame 800, and the second fastening member 800b is formed of a metal material.

Since the mold frame 800 is made of plastic, cracks, etc., may occur when the first fastening member 1005, which is a metal material, may be cracked, and thus the second fastening member made of metal may be used without a separate bracket. 800b).

Subsequently, although not shown, the front case is coupled to face the top chassis 900, and the rear case is coupled to face the front case to complete the liquid crystal display.

As such, by not adopting a bracket employed in a general side mounting coupling structure, a space that is at least as wide as the width of the side wall of the bracket is not required, so that the thickness N to the outer surface of the side wall of the top chassis 140 is not thickened.

That is, in the general liquid crystal display described with reference to FIG. 1, a thickness of 'B' should be secured by employing a bracket to sufficiently secure the fastening force by the fastening member fastened from the side. However, in the liquid crystal display according to the present invention described with reference to FIG. 4, since a fastening member is fastened at the bottom surface of the mold frame side wall without a separate bracket, a thickness of 'N' smaller than 'B' is sufficient. You can check it. Therefore, the overall size of the liquid crystal display device can be reduced.

According to the flat panel display as described above, a fastening hole is formed on the bottom surface of the side wall of the mold frame, and is provided with a second fastening member made of a metallic material surrounding the fastening hole and fastened to the first fastening member.

Therefore, it is not necessary to increase the side thickness of the flat panel display in order to secure the fastening space separately, thereby reducing the overall size of the flat panel display.

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

Claims (5)

A display unit for displaying an image; A fastening hole is formed in a bottom surface of the side wall, and a backlight assembly having a light source unit for generating light, and a mold frame receiving the light and sequentially receiving the display unit; And a first fastening means fastened to the fastening hole and having a screw thread for fixing the display unit and the mold frame. The flat panel display of claim 1, wherein the fastening hole is a groove formed in a bottom surface of the sidewall. The flat panel display of claim 2, further comprising: a second fastening means which surrounds an outer wall of the fastening hole and has a screw groove formed to be fixed to the first fastening means. The flat panel display of claim 3, wherein the second fastening means is made of a metallic material. The flat panel display of claim 1, wherein a plurality of fastening holes are formed in the mold frame.