KR20070052952A - Liquid crystal display device - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device that improves EMI characteristics, sound noise, and improves workability and productivity. The present invention relates to a liquid crystal panel for displaying an image, and a backlight for irradiating light to the liquid crystal panel. A cover bottom accommodating a unit, the backlight unit and the liquid crystal panel, a printed circuit board connected to the liquid crystal panel and formed above the cover bottom, a user connector formed above the printed circuit board, and the user connector. And a cover shield formed to be spaced apart from the user connector, and a gasket formed on a rear surface of the bending part.

LCD, Cover Shield, Bending Section, Gas Cat, User Connector

Description

Liquid Crystal Display Device

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

FIG. 2 is an exploded perspective view illustrating a rear surface of the liquid crystal display of FIG. 1.

3 is a photo showing in detail the user connector portion of the conventional liquid crystal display device

4 is a rear view illustrating a rear surface of the liquid crystal display of FIG. 1.

5 is an exploded perspective view showing a rear surface of the liquid crystal display according to the first embodiment of the present invention.

FIG. 6 is an enlarged side view of the user connector of FIG. 5 and a cover shield corresponding thereto; FIG.

7 is an exploded perspective view illustrating a rear surface of a liquid crystal display according to a second embodiment of the present invention.

FIG. 8 is an enlarged side view of the user connector of FIG. 7 and a cover shield corresponding thereto; FIG.

9A is a top view illustrating a cover shield in a liquid crystal display according to the present invention.

9B is an enlarged view of the 'Z'-shaped bending part of FIG. 9A.

FIG. 10 is a view showing a state in which a cover shield provided with a 'Z'-shaped bending part and a gasket in a liquid crystal display according to the present invention covers a user connector.

Explanation of symbols for the main parts of the drawings

110: TCP 120: data PCB

124: cover bottom 126: 'Z' shaped bending part

127: Gascat 128: Cover Shield

130: case top 150: user connector

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display, and more particularly, to prevent damage to a user connector through mechanical reinforcement of a cover shield, and to improve EMI characteristics and sound noise. It relates to a liquid crystal display device.

As the information society develops, the demand for display devices is increasing in various forms, and in recent years, liquid crystal display devices (LCDs), plasma display panels (PDPs), electro luminescent displays (ELD), and vacuum fluorescent (VFD) Various flat panel display devices such as displays have been studied, and some of them are already used as display devices in various devices.

Among them, LCD is the most widely used as the substitute for CRT (Cathode Ray Tube) for mobile image display device because of its excellent image quality, light weight, thinness, and low power consumption. In addition to the use of the present invention has been developed in various ways such as a television and a computer monitor for receiving and displaying broadcast signals.

In order to use such a liquid crystal display as a general screen display device in various parts, it is a matter of how high quality images such as high definition, high brightness and large area can be realized while maintaining the characteristics of light weight, thinness and low power consumption. Can be.

A general liquid crystal display device includes a system for largely applying a liquid crystal display module, a power source for driving the liquid crystal display module, and generating a control signal for driving the liquid crystal display module and the liquid crystal display module and the system. It consists of an external case.

The outer case is a material for protecting the liquid crystal display module and the system, and has a buffering effect against impact, and casings the liquid crystal display module and the system under conditions that do not reduce the efficiency of the display area. casing

Hereinafter, a liquid crystal display according to the related art will be described with reference to the accompanying drawings.

1 is a schematic exploded perspective view illustrating a conventional liquid crystal display, and FIG. 2 is an exploded perspective view illustrating a rear surface of the liquid crystal display of FIG. 1.

As shown in FIG. 1, a conventional liquid crystal display device includes a liquid crystal panel 2 for displaying an image, a back light unit for irradiating light to the liquid crystal panel 2, and the liquid crystal panel ( 2) It is configured to include a board assembly unit (Board Assembly Unit) for driving and a casing for these.

The liquid crystal panel 2 may include a lower substrate 4 having a TFT array, an upper substrate 6 having a color filter array, and a liquid crystal layer formed between the lower and upper substrates 4 and 6. )

In addition, the lower substrate (TFT array substrate) 4 includes a plurality of gate lines arranged in one direction at a predetermined interval, a plurality of data lines arranged at regular intervals in a direction perpendicular to the gate lines, and A plurality of pixel electrodes formed in a matrix form in each pixel region defined by crossing each of the gate wirings and the data wirings, and a plurality of thin films which are switched by signals of the gate wirings to transfer the signals of the data wirings to each pixel electrode Transistors are formed.

The upper substrate (color filter substrate) 6 includes a light shielding layer for blocking light in portions other than the pixel region, R, G, and B color filter layers for expressing color colors, and the upper substrate ( 6) A common electrode (not shown) formed on the front surface is formed.

Although not shown, a first polarizing plate and a second polarizing plate are further formed on the rear surfaces of the upper substrate 6 and the lower substrate 4 to control light transmission according to the alignment of the liquid crystal.

The backlight unit may include an optical sheet 18 positioned below the liquid crystal panel 2, a fluorescent lamp (not shown) formed at both sides or one side of the liquid crystal panel 2, and the optical sheet 18. And a light guide plate 16 configured to convert the light emitted from the fluorescent lamp into a surface light source.

In addition, the board assembly unit may include a drive IC 12 formed on the TCP 14 so as to apply a drive signal to each of the gate wiring and the data wiring, and a PCB connected to the drive IC 12 on the data wiring side. 20) and a cover shield 28 covering the PCB 20.

On the other hand, the drive IC on the gate wiring side and the drive IC on the data wiring side are electrically connected through line on glass (LOG) wiring.

The TCP film has a structure in which a metallic conductive layer is inserted in a single layer or multiple layers between layers of a flexible material such as polyamide.

In some cases, the gate or data drive IC may be embedded in the liquid crystal panel.

In addition, the PCB may be configured on the data wiring side as one, or a gate PCB and a data PCB corresponding to the gate drive IC and the data drive IC may be formed, respectively.

The case may include a cover bottom 26 disposed under the backlight unit including the fluorescent lamp, the light guide plate 16, and the like, and a frame shape corresponding to the upper portion of the optical sheet 18 to form the liquid crystal panel ( A guide panel 22 for guiding the position of 2), a support main 24 for mounting the optical sheet 18 and the light guide plate 16 inside the cover bottom 26, and the liquid crystal panel. (2) and the case top 30 formed in a shape surrounding the edges and sides of the structures below.

Meanwhile, the cover shield 28 included in the board assembly unit may be viewed as a casing.

As shown in FIG. 2, when the rear surface of the liquid crystal display according to the related art is seen, a cover bottom 26 appears on an upper surface and a side of the rear surface, and the data drive IC passes through the side and top surfaces of the cover bottom 26. The included TCP 10 is folded.

The folded TCP 10 is in contact with the data PCB 20, and the data PCB 20 is located on the cover bottom 26. A cover shield 28 corresponds to an upper portion of the cover bottom 26 to cover the first hole 32 provided in the cover shield 28 and the second hole 34 provided in the cover bottom 26. It is assembled via a penetrating screw 36.

In this case, a user connector 50 is formed on the data PCB 20, and the cover shield 28 is formed with an open portion on the cover shield 28 to have a shape in which the user connector 50 is exposed. In addition, the user connector 50 facilitates connection with an external system (not shown).

3 is a photograph showing in detail a user connector portion of a liquid crystal display according to the prior art.

As shown in FIG. 3, in the liquid crystal display device according to the related art, the user connector 50 is exposed from the cover shield 28.

Therefore, when the tester applies an electrical signal or separates the tester, the tester exerts a force on the user connector 50. However, damage may occur because the user connector 50 is exposed.

Here, the user connector 50 was formed to be spaced about 3 mm from the cover shield 28 at a distance on the side surface.

4 is a rear view illustrating a rear surface of the liquid crystal display of FIG. 1.

As shown in FIG. 4, in the liquid crystal display, the cover shield 28 covers a part of the cover bottom 26, that is, the data PCB 20 except for the user connector 50, and the cover shield 28 and the case. The conductive tape 31 is attached to the tower 30 to improve EMI characteristics.

However, the liquid crystal display according to the related art has the following problems.

That is, in the case of the liquid crystal display module, since the user connector is exposed from the cover shield, when the user connector is fastened to the system or separated from the system after the inspection, the user connector does not have a shield on the top, and thus damage occurs. easy.

In addition, a module process of attaching a conductive tape to the cover shield and the case top is added to improve EMI characteristics, thereby reducing workability and productivity.

The present invention has been made to solve the above problems to prevent damage to the user connector through the reinforcement of the mechanical shape of the cover shield (shield) and at the same time EMI characteristics and sound noise (sound noise) It is an object of the present invention to provide a liquid crystal display device for improving.

Another object of the present invention is to provide a liquid crystal display device for improving workability and productivity.

The liquid crystal display device of the present invention for achieving the above object comprises a liquid crystal panel for displaying an image, a backlight unit for irradiating light to the liquid crystal panel, a cover bottom for housing the backlight unit and the liquid crystal panel; A cover shield connected to the liquid crystal panel and formed on an upper side of the cover bottom, a user connector formed on an upper side of the printed circuit board, and a bent part covering an upper portion of the user connector and spaced apart from the user connector And, it characterized in that it comprises a gas cat formed on the back of the bending portion.

Hereinafter, a liquid crystal display according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 5 is an exploded perspective view illustrating a rear surface of a liquid crystal display according to a first embodiment of the present invention, and FIG. 6 is an enlarged side view of the user connector of FIG. 5 and a corresponding cover shield (cover bottom in the liquid crystal display). And the structure between the case top and the structure of FIG. 1).

As shown in FIG. 5, the liquid crystal display according to the first exemplary embodiment of the present invention includes a liquid crystal panel (not shown) for displaying an image, a back light unit for irradiating light to the liquid crystal panel, and It includes a board assembly unit for driving the liquid crystal panel (Board Assembly Unit) and casings for casing them, is formed integrally with the cover shield 128 corresponding to the upper portion of the user connector 150, the user connector 150 It is characterized in that it further comprises a 'Z'-shaped bending portion 126 covering ().

Here, the liquid crystal panel includes a first substrate having a TFT array, a second substrate having a color filter array, and a liquid crystal layer (not shown) formed between the first and second substrates.

The first substrate (TFT array substrate) has a plurality of gate lines arranged in one direction at regular intervals, a plurality of data lines arranged at regular intervals in a direction perpendicular to the gate lines, and the gate lines; A plurality of pixel electrodes formed in a matrix form in each pixel region defined by crossing data lines and a plurality of thin film transistors that are switched by signals of the gate lines to transfer signals of the data lines to each pixel electrode are formed.

The second substrate (color filter substrate) includes a light shielding layer for blocking light in portions other than the pixel region, an R, G, and B color filter layers for expressing color colors, and an entire surface of the second substrate. The common electrode is formed.

On the other hand, a first polarizing plate and a second polarizing plate are further formed on the rear surface of each of the second substrate and the first substrate to adjust the light transmission according to the alignment of the liquid crystal.

The backlight unit may include an optical sheet positioned below the liquid crystal panel, a fluorescent lamp formed on both sides or one side of the liquid crystal panel, and a light guide plate below the optical sheet and positioned on the fluorescent lamp side. .

In addition, the board assembly unit may include a drive IC (not shown) formed on the TCP 110 to apply a driving signal to each of the gate line and the data line, and the data PCB 120 connected to the drive IC on the data line side. It comprises a cover shield 128 to cover. In the illustrated structure, the drive IC on the gate wiring side and the drive IC on the data wiring side are electrically connected through a line on glass (LOG) wiring.

The casing includes a cover bottom 124 formed around the back light unit including a fluorescent lamp, a light guide plate, and the like, and a top of the optical sheet in a frame shape to guide the position of the liquid crystal panel. A guide panel (not shown), a support main (not shown) for seating the optical sheet and the light guide plate inside the cover bottom 124, and edges and sides of the liquid crystal panel and the following structure. It includes a case top 130 formed in a wrapping shape.

On the other hand, when the rear side of the cover bottom 124 is observed in detail, the cover bottom 124 appears on the top surface and the side surface, and passes the side surface and the top surface of the cover bottom 124 through the TCP (including the data drive IC). 110 is observed to be folded over.

In addition, the overlying TCP 110 is in contact with the data PCB 120, and the data PCB 120 is located on the cover bottom 124. A cover shield 128 corresponds to an upper portion of the cover bottom 124 to cover the first hole 132 provided in the cover shield 128 and the second hole 134 provided in the cover bottom 124. It is assembled via a penetrating screw 136.

In this case, a user connector 150 is formed on the data PCB 120, and the cover shield 128 has an open portion on the cover shield 128 to have a shape in which the user connector 150 is exposed. By being formed with, the user connector 150 facilitates connection with an external system (not shown).

As shown in FIG. 6, in the liquid crystal display according to the first exemplary embodiment of the present invention, the user connector 150 and the side of the cover shield 128 corresponding thereto will be described in more detail. It is formed close to the end on the PCB 120, the cover shield 128 is formed so that the 'Z'-shaped bending portion 126 is further extended from the side to cover the user connector 150.

In this case, the 'Z'-shaped bending part 126 is integrally formed with the cover shield 128 and extends from the cover shield 128, and is spaced apart from the user connector 150 by a predetermined distance (H). do.

This is to facilitate access of the user connector 150 and a connector (not shown) from an external system when connected to or disconnected from an external system (not shown).

If the 'Z'-shaped bending portion 126 is formed without being spaced apart from the user connector 150, it is not easy to connect and disconnect with the connector of the system, and may be damaged if excessive force is applied. Because there is.

The 'Z'-shaped bending part 126 is formed to be spaced apart at a first interval in a portion where the user connector 150 is not formed, and relatively relative to the first interval at a portion where the user connector 150 corresponds. Small and spaced apart from the flat surface of the cover shield 128 that does not correspond to the user connector 150 by a second interval (H) of the user connector 150 and the 'Z'-shaped bending portion 126 With intervals.

Here, the second spacing (H) is formed to be spaced apart from the user connector 150 at intervals of about 1mm.

FIG. 7 is an exploded perspective view illustrating a rear surface of a liquid crystal display according to a second exemplary embodiment of the present invention, and FIG. 8 is an enlarged side view of the user connector of FIG. 7 and a cover shield corresponding thereto.

6 and 7, the liquid crystal display according to the second exemplary embodiment of the present invention extends from the cover shield to cover the back of the 'Z'-shaped bending part 126 that covers the user connector 150. It is the same as the first embodiment except that the gasket 127 is configured to be in contact with the user connector 150.

That is, the cover bottom 124 appears on the top and side surfaces of the rear side of the liquid crystal display, and the TCP 210 including the data drive IC (not shown) passes through the side and top surfaces of the cover bottom 124. Fold over is observed.

In addition, the overlying TCP 110 is in contact with the data PCB 120, and the data PCB 120 is located on the cover bottom 124. A cover shield 128 corresponds to an upper portion of the cover bottom 124 to cover the first hole 132 provided in the cover shield 128 and the second hole 134 provided in the cover bottom 124. It is assembled via a penetrating screw 136.

In this case, a user connector 150 is formed on the data PCB 120, and the cover shield 128 has an open portion on the cover shield 128 to have a shape in which the user connector 150 is exposed. By being formed with, the user connector 150 facilitates connection with an external system (not shown).

In addition, the 'Z'-shaped bending part 126 is configured to be spaced apart from the user connector 150 at intervals of about 1 mm.

As shown in FIG. 8, in the liquid crystal display according to the second exemplary embodiment of the present invention, the user connector 150 and the side of the cover shield 128 corresponding thereto will be described in detail. It is formed close to the end on the PCB 120, the cover shield 128 is formed so that the 'Z'-shaped bending portion 126 is further extended from the side to cover the user connector 150.

In this case, the 'Z' shaped bending part 126 is integrally formed with the cover shield 128 and extends from the cover shield 128, and is formed in contact with the user connector 150.

This is to facilitate access of the user connector 150 and a connector (not shown) from an external system when connected to or disconnected from an external system (not shown).

If the 'Z'-shaped bending portion 126 is formed without being spaced apart from the user connector 150, it is not easy to connect and disconnect with a connector (not shown) of the system, and excessive force is applied. This is because there is a risk of damage.

Here, a gasket 127 is formed on an upper portion of the user connector 150, that is, a rear surface of the 'Z'-shaped bending portion 126.

Meanwhile, reference numeral 130 not described in FIG. 7 denotes a case top covering edges and sides of the liquid crystal panel (not shown) and the backlight unit (not shown).

FIG. 9A is a top view of the cover shield of the LCD according to the present invention, and FIG. 9B is an enlarged view of the 'Z'-shaped bending part of FIG. 9A.

As shown in FIGS. 9A and 9B, the cover shield 128 has a 'Z' shaped bending portion 126 extending from one side and integrally formed, and has a EMI on the back of the 'Z' shaped bending portion 126. The gasket 127 is attached to improve the characteristic.

Here, the gasket 127 has a conductive double-sided tape shape, one side is attached to the 'Z'-shaped bending part 126 and the other side is in contact with the user connector 150.

On the other hand, the surface of the gasket 127 is conductive, the inside is composed of a material that can play a soft and cushioning role.

FIG. 10 is a view illustrating a state in which a cover shield provided with a 'Z'-shaped bending part and a gasket in a liquid crystal display according to the present invention covers a user connector.

As shown in FIG. 10, a cover shield 128 including a 'Z' shaped bending part 126 and a gasket 127 is formed on an upper portion of the user connector 150.

Therefore, since the gas cat 127 is formed between the 'Z'-shaped bending part 126 and the user connector 150, the contact between the' Z'-shaped bending part 126 and the user connector 150 may occur. Sound noise can be prevented from occurring.

In addition, since the EMI characteristics can be improved without attaching a separate conductive tape as in the related art, workability and TAC time can be reduced.

In addition, the liquid crystal display device of the present invention, by reinforcing the cover shield shape, to prevent damage to the user connector (User Connector) damage, reducing the process steps through improved workability by reducing defects due to the assembly of the liquid crystal module and panel for sale And cost down effect is expected.

On the other hand, the present invention described above is not limited to the above-described embodiment and the accompanying drawings, it is possible that various substitutions, modifications and changes within the scope without departing from the technical spirit of the present invention. It will be apparent to those of ordinary skill in Esau.

The liquid crystal display according to the present invention as described above has the following advantages.

That is, damage to the user connector can be prevented by forming a 'Z'-shaped bending part in a shape covering the user connector and forming a gasket. As such, by preventing damage to the user connector, it is possible to expect a reduction in process steps and a cost down effect by improving workability by reducing defects due to molding when assembling the liquid crystal module and the panel for sale.

In addition, it is possible to improve the EMI characteristics through a gasket without attaching a separate conductive tape, thereby improving workability and preventing the occurrence of sound noise.

Claims (4)

A liquid crystal panel displaying an image, A backlight unit for irradiating light to the liquid crystal panel; A cover bottom for storing the backlight unit and the liquid crystal panel; A printed circuit board connected to the liquid crystal panel and formed on the cover bottom; A user connector formed on an upper side of the printed circuit board; A cover shield provided with a bending portion covering an upper portion of the user connector and spaced apart from the user connector; And a gasket formed in contact with an upper surface of the user connector and formed on a rear surface of the bending part. The liquid crystal display of claim 1, wherein the bending portion has a 'Z' shape connected to the cover shield on a vertical side through which the user connector passes. The liquid crystal display of claim 1, wherein the gasket is formed of a double-sided conductive tape. The liquid crystal display device according to claim 1, wherein the gasket includes a material that acts as a buffer, such as a sponge, and a surface thereof is made of a conductive material.

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