KR20060015910A - A liquid crystal display for guiding and fixing lamp wires - Google Patents

Abstract

The present invention relates to a liquid crystal display device for fixing a lamp wire guide. To this end, a liquid crystal display device according to the present invention includes a liquid crystal display panel for displaying an image, a backlight assembly including a lamp for supplying light to the liquid crystal display panel, and a guide wire for fixing and supporting the lamp wire connected to the lamp by housing the backlight assembly. And a mold frame provided with a removable fixing member. Through the present invention, it is possible to fix the lamp wire regardless of the size of the printed circuit board.

Lamp Wire, Guide, Mold Frame, Printed Circuit Board

Description

Liquid crystal display for fixing lamp wires {A LIQUID CRYSTAL DISPLAY FOR GUIDING AND FIXING LAMP WIRES}

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

2 is a rear perspective view of the liquid crystal display according to the first embodiment of the present invention.

3 is a plan view of a portion A of FIG. 2.

4 is a diagram illustrating an operating state of a liquid crystal display according to a second exemplary embodiment of the present invention.

5 is a diagram illustrating an operating state of a liquid crystal display according to a third exemplary embodiment of the present invention.

The present invention relates to a liquid crystal display device for fixing the lamp wire, and more particularly, to a liquid crystal display device that can be fixed to the lamp wire irrespective of the size of the printed circuit board.

With the recent rapid development of semiconductor technology, the demand for liquid crystal display devices that are smaller and lighter and has improved performance 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 and is currently used in almost all information processing equipment that requires 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.

In the case of such a liquid crystal display, a lamp is mainly used as a backlight. The lamp receives power by connecting to an inverter board through a lamp wire to emit the lamp. Since the inverter board is mounted on the rear of the backlight assembly including components necessary for supplying light in addition to the backlight, the lamp wire must be drawn out to the rear of the backlight assembly and connected to the inverter board. Accordingly, the lamp wires should be fixed so as not to increase the thickness of the liquid crystal display device. In general, since the inverter board is located near the center of the back of the backlight assembly, there is a problem in that the lamp wires drawn out from the corners are bent and fixed. Therefore, the mold frame positioned at the back of the backlight assembly is formed in a bent shape to fix the lamp wire on the mold frame.

However, since the liquid crystal display device must be applied to products having various sizes and performances, it is frequently required to use printed circuit boards having different sizes. Accordingly, the shape of the mold frame should be changed so that the mold frame overlapped with the printed circuit board around the printed circuit board does not interfere with the printed circuit board. In this case, since the mold for manufacturing the mold frame has to be changed for each LCD model, it is expensive. Therefore, the change of the mold is almost impossible.

In addition, there is an increasing need for a liquid crystal display device having a structure that can prevent the occurrence of contact between the printed circuit board and the lamp wire fixed on the mold frame due to the contact between the printed circuit board and the mold frame.

The present invention has been made in view of the above-described problems, and provides a liquid crystal display device which can fix a lamp wire regardless of the size of a printed circuit board while improving the reliability of electrical connection of the lamp wire by fixing the lamp wire with a guide. I would like to.

The liquid crystal display device according to the present invention for achieving the above object, and accommodates and supports the backlight assembly including a liquid crystal display panel for displaying an image, a backlight for supplying light to the liquid crystal display panel, and the backlight assembly And a mold frame provided with a removable fixing member for guiding and fixing a lamp wire connected to the lamp.

In the liquid crystal display device according to the present invention, a support member is formed on a mold frame to guide fix the lamp wire between the support member and the removable fixing member.

It is preferable that one or more concave grooves are formed at a lower portion of the removable fixing member to be fitted to a plurality of protrusions formed on the mold frame.

The removable fixing member may include a first fixing part in which one or more concave grooves are formed, a second fixing part in which one or more concave grooves are formed, and a connection part connecting the first fixing part and the second fixing part.

The thickness of the connection portion is smaller than the thickness of the first fixing portion and the thickness of the second fixing portion, it is preferable to connect the upper surface of the first fixing portion and the second fixing portion.

The second fixing part may be spaced apart from the first fixing part in an oblique direction.

Here, the connecting portion is preferably formed of a flexible member.

The liquid crystal display device according to the present invention further includes a printed circuit board (PCB) connected to the liquid crystal display panel, and the mold frame portion positioned below the printed circuit board is preferably in the form of a thin plate.

The liquid crystal display according to the present invention further includes a printed circuit board connected to the liquid crystal display panel, and the removable fixing member may be provided between the lamp wire and the printed circuit board.

In addition, one or more concave grooves are formed in the lower portion of the removable fixing member to be fitted to a plurality of protrusions formed on the mold frame, and the position where the removable fixing member is fitted can be changed according to the size of the printed circuit board.

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.

FIG. 1 is an exploded perspective view of a liquid crystal display 100 according to a first exemplary embodiment of the present invention, and illustrates a lamp wire 141 and a socket 14 connected to a lamp (not shown). 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 exemplary embodiment of the present invention illustrated 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. . In addition, a top chassis 60, an upper mold frame 62, a bottom chassis 64, and a lower mold frame 12 are combined to fix and support them. .

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) 44, and a PCB 16. 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 between the substrates. Not shown). Polarizers (not shown) are attached to the upper portion of the color filter substrate 53 and the lower portion of the TFT substrate 51 to linearly polarize the visible light supplied from the backlight assembly 70.

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 inputted from the PCB 16 to the data lines and gate lines of the liquid crystal display panel 50 described above, electrical signals are inputted 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.

In order to control the alignment angles of the liquid crystals and the timing at which the liquid crystals are arranged in the liquid crystal display panel 50, a driving signal and a timing signal are applied to the gate line and the data line of the TFT, and the timing of applying the data driving signal and the gate driving signal is determined. TCP 44 is attached for this purpose.

A printed circuit board (PCB) 16 for receiving an image signal from the outside of the liquid crystal display panel 50 and applying a driving signal to the data line and the gate line, respectively, is attached to the liquid crystal display panel 50. It connects with TCP44. The PCB 16 generates a data signal for driving the liquid crystal display device 100, a gate driving signal, and a plurality of driving signals for applying these signals at an appropriate time, thereby converting the gate driving signal and the data driving signal into the TCP (44). Are applied to the gate line and the data line of the liquid crystal display panel 50, respectively.

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 received and fixed in the bottom chassis 64, and emits light and is installed inside the lamp cover 76, a lamp (not shown), and a lamp cover 76 that wraps around the lamp to protect the lamp. The light guide plate 74 for guiding the light emitted from the lamp and supplying the light to the liquid crystal display panel 50, the reflective sheet 78 positioned below the light guide plate 74 to reflect the light, and the luminance characteristics of the light from the lamp. An optical sheet 72 for securing and providing light to the liquid crystal display panel 50 is provided.

On the back of the bottom chassis 64, an inverter board 82 (shown below in FIG. 2) and a signal conversion PCB 84 (shown in FIG. 2 below), which are power supply PCBs, are installed. do. The inverter board transforms an external power supply to a constant voltage level and supplies the lamp to the lamp, and the signal conversion PCB is connected to the PCB 16 described above to convert an analog data signal into a digital data signal and provides the same to the liquid crystal display panel 50. . The socket 14 connected to the lamp wire 141 is drawn out to the rear surface of the bottom chassis 64 through the lower mold frame 12 and connected to the connector mounted on the inverter board.

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 lower mold frame 12 while bending the PCB 16 to the outside of the bottom chassis 64. Equipped. The bent PCB 16 is fixedly supported on the bottom chassis 64, and the lower mold frame 12 receives and supports the backlight assembly 70. Although not shown in FIG. 1, the front case and the rear case are positioned at the upper part of the top chassis 60 and the lower part of the lower mold frame 12 to form the liquid crystal display device 100 by combining them.

FIG. 2 is a rear perspective view of the liquid crystal display device 100 according to the first embodiment of the present invention. FIG. 2 is a view illustrating the X-axis rotated by 180 ° after combining the components of the liquid crystal display device 100 shown in FIG. to be.

As shown in FIG. 2, a lower mold frame 12 having a thin plate shape is positioned on a lower left side of the PCB 16 connected to the liquid crystal display panel. Since the part of the lower mold frame 12 located on the lower left side of the PCB 16 is in the form of a thin plate, the PCB 16 is not lifted to the top even if any type of PCB 16 is placed on the upper portion thereof. Therefore, there is an advantage that can be installed even if the size of the PCB 16 is variously modified. Meanwhile, when fixing the lamp wire 141, the removable fixing member 10 may be installed in the lower mold frame 12 to fix the lamp wire 141 to guide, thereby preventing electrical connection of the lamp wire 141. Reliability can be maintained.

In the enlarged circle of FIG. 2, one of the plurality of protrusions 121 formed on the lower mold frame 12 and the concave groove 101 formed in the lower portion of the removable fixing member 10 to be fitted thereto are shown. do. This coupling method between the removable fixing member 10 and the lower mold frame 12 is merely to illustrate the present invention, but the present invention is not limited thereto. Therefore, you can combine both in other ways.

As described above, one or more concave grooves 101 are formed in the lower portion of the detachable fixing member 10 to be fitted to the plurality of protrusions 121 formed on the lower mold frame 12, thereby efficiently fitting the lamp wire 141. After fixing the guide, the socket 14 connected to the lamp wire 141 may be coupled to the inverter board 82. Thus, the lamp wire 141 is fixed well without being lifted.

The removable fixing member 10 includes two fixing parts 111 and 115 spaced apart from each other and a connecting portion 113 connecting them to each other. In addition, other parts may be included as needed. Here, the thickness of the connecting portion 113 is smaller than the thickness of the fixing portions 111 and 115, the connecting portion 113 connects the upper surface of both fixing portions (111, 115). That is, as shown in FIG. 3, a space is formed below the connecting portion 113. When the position where the removable fixing member 10 is fitted according to the size of the PCB 16 is changed, that is, the lower mold frame 12 into which the concave groove 101 formed in the lower portion of the removable fixing member 10 is fitted. When the position of the protrusion 121 of the upper part is changed, the protrusion 121 which is not fitted to the lower portion of the connection part 113 may be stored. Accordingly, the removable fixing member 10 can be firmly fitted onto the lower mold frame 12.

As described above, the removable fixing member 10 may be installed on the lower mold frame 12 to guide-fix the lamp wire 141, but the support member 123 may be installed on the lower mold frame 12. In this case, the lamp wire 141 may be fixed to the guide more efficiently. That is, when the support member 123 is installed on the lower mold frame 12, the lamp wire 141 may be guided and fixed efficiently between the support member 123 and the removable fixing member 10. have.

Hereinafter, a method of guiding and fixing the lamp wire 141 while attaching and detaching the detachable fixing member 10 according to the size of the PCB 16 will be described in detail with reference to FIGS. 3 to 5. For convenience, in FIG. 3 to FIG. 5, the recessed groove formed in the lower portion of the removable fixing member 10 and the protrusion formed on the lower mold frame 12 are fitted with a thick line to distinguish it from other portions not fitted. It represents the sun.

FIG. 3 is a plan view of a portion A of FIG. 2, and is a view of the lower mold frame 12 in which the removable fixing member 10 is installed, as viewed from the Z-axis direction of FIG. 2.

As shown in FIG. 3, the removable fixing member 10 includes a first fixing portion 111, a connecting portion 113, and a second fixing portion 115. One or more concave grooves are formed in the lower portion of the first fixing portion 111, and one or more concave grooves are formed in the lower portion of the second fixing portion 115. The connection part 113 connects the first fixing part 111 and the second fixing part 115. In FIG. 3, three concave grooves are formed in the lower part of the first fixing part 111 and the lower part of the second fixing part 115, respectively, but this is merely to illustrate the present invention and the present invention is provided herein. It is not limited to. Therefore, one or more concave grooves may be formed.

As shown in FIG. 3, the removable fixing member 10 fitted on the lower mold frame 12 and the supporting member 123 formed on the lower mold frame 12 according to the size of the PCB 16. Fix the lamp wire 141 located between the guides. Here, the removable fixing member 10 serves as a partition wall to prevent the lamp wire 141 from interfering with the PCB 16. In particular, since the second fixing part 115 is spaced apart from the first fixing part 111 in an oblique direction, that is, a direction crossing the X-axis and the Y-axis obliquely, the lamp wire 141 can be more easily guided to the inverter board side. have.

4 is a view showing an operating state of the liquid crystal display according to the second exemplary embodiment of the present invention, which shows a state using a PCB 26 having a longer length in the Y-axis direction, that is, a PCB 26 lowered further down. Drawing. Since the width of the PCB 26, that is, the length in the X-axis direction is automatically limited according to the size of the liquid crystal display device, in the present invention, as described above, the PCB 26 may be elastically adjustable regardless of the size of the liquid crystal display device. Consider only the change in the length of the Y axis in

In the liquid crystal display device according to the second embodiment of the present invention, since the large sized PCB 26 is provided, the removable fixing member 10 is removed and moved down one step so as not to overlap with the removable fixing member 10. It is attached on the lower mold frame 12. As such, even when the removable fixing member 10 is moved, the connection part 113 may be formed of a flexible member such as rubber to deform the removable fixing member 10, thereby providing an advantage of free attachment. As the removable fixing member 10 moves, the protrusion 121 formed on the lower mold frame 12 is accommodated in the space provided under the connecting portion 113 so that the removable fixing member 10 is not raised. Therefore, the removable fixing member 10 can be firmly fixed on the lower mold frame 12.

FIG. 5 is a view showing an operating state of a liquid crystal display according to a third exemplary embodiment of the present invention, in which the length of the Y-axis direction is longer, that is, the PCB 36, which is further lowered downward. It is a figure which shows.

In this case, as in the second embodiment of the present invention, the removable fixing member 10 may be moved downward to fix the lamp wire 141 while corresponding to the larger PCB 36. Accordingly, the lamp wire 141 may be guide-fixed while elastically responding to the size change of the PCB 36, and the contact between the lamp wire 141 and the PCB 36 may be prevented by using the removable fixing member 10. Can be.

As described above, the liquid crystal display device according to the present invention, since the removable fixing member for guiding the lamp wire connected to the lamp in the mold frame is installed, the lamp wire is guided to fix the lamp wire while flexibly responding to the size change of the PCB It can be connected to the inverter board located in the rear center of the assembly. As a result, the reliability of the electrical connection of the lamp wire can be ensured, and electrical contact with the PCB can be prevented.                     

The liquid crystal display according to the present invention forms a support member on the mold frame to guide fix the lamp wire between the support member and the removable fixing member, so that the lapping wire can be guided more efficiently.

Since at least one concave groove is formed in the lower portion of the removable fixing member to be fitted to a plurality of protrusions formed on the mold frame, the removable fixing member can be firmly fixed on the mold frame.

The removable fixing member includes a first fixing part having at least one concave groove, a second fixing part having at least one other concave groove, and a connection part connecting the first fixing part and the second fixing part, There is an advantage of easy removal.

The thickness of the connecting portion is smaller than the thickness of the first fixing portion and the thickness of the second fixing portion, and connects the upper surfaces of the first fixing portion and the second fixing portion, so that the protrusion formed on the mold frame can be accommodated in the lower space of the connecting portion. The removable fastening member can be firmly fixed on the mold frame.

Since the second fixing part is spaced apart from the first fixing part in an oblique direction, the second fixing part may guide the lamp wire to approach the inverter board.

Here, since the connecting portion is formed of a flexible member, the removable fixing member does not fall off even if it is fixed on the mold frame by moving.

Since the mold frame portion located at the bottom of the PCB is in the form of a thin plate, there is an advantage that the PCB does not lift due to contact with the mold frame even if the size of the PCB is changed.

Since the removable fixing member is installed between the lamp wire and the PCB, there is an advantage that the durability of the liquid crystal display device can be improved by preventing electrical contact between the lamp wire and the PCB.

In the liquid crystal display device according to the present invention, since the position where the removable fixing member is fitted can be changed according to the size of the printed circuit board, there is an advantage that the liquid crystal display device can be universally used in liquid crystal display devices of various sizes.

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 backlight assembly including a lamp for supplying light to the liquid crystal display panel, and A mold frame accommodating and supporting the backlight assembly and having a removable fixing member for guiding and fixing a lamp wire connected to the lamp. Liquid crystal display comprising a. In claim 1, And a support member on the mold frame to guide fix the lamp wire between the support member and the removable fixing member. In claim 2, One or more concave grooves are formed in the lower portion of the detachable fixing member and are fitted to a plurality of protrusions formed on the mold frame. In claim 3, The removable fixing member, A first fixing part in which the at least one concave groove is formed side by side, A second fixing part spaced apart from the first fixing part, and having at least one other concave groove formed side by side; and Connecting portion connecting the first fixing portion and the second fixing portion Liquid crystal display comprising a. In claim 4, The thickness of the connection portion is less than the thickness of the first fixing portion and the thickness of the second fixing portion, the liquid crystal display device connecting the upper surface of the first fixing portion and the second fixing portion. In claim 4, And the second fixing part is spaced apart from the first fixing part in an oblique direction. In claim 4, And the connection part is formed of a flexible member. In claim 2, And a printed circuit board (PCB) connected to the liquid crystal display panel, wherein the mold frame portion disposed below the printed circuit board has a thin plate shape. In claim 2, And a printed circuit board connected to the liquid crystal display panel, wherein the removable fixing member is disposed between the lamp wire and the printed circuit board. In claim 9, One or more concave grooves are formed in the lower portion of the removable fixing member to be fitted to the plurality of protrusions formed on the mold frame, and to change the position at which the removable fixing member is fitted according to the size of the printed circuit board. Device.

Images