KR20070044662A - Liquid crystal display - Google Patents

Abstract

The present invention relates to a liquid crystal display device comprising: a liquid crystal display panel for providing a screen; a printed circuit board; and a plurality of tape carrier packages electrically connecting the liquid crystal display panel and the printed circuit board; And a mold frame fixing the driving circuit unit, wherein the mold frame is positioned to face the front frame on which the printed circuit board and the tape carrier packages are located, and the front frame. To include a rear frame and a plurality of side frames connecting the front frame and the rear frame, respectively, characterized in that the front frame is removable from the side frame.

According to the present invention, when the shape of the printed circuit board or the number of tape carrier packages changes, only the shape of the front frame may be changed accordingly, thus reducing the time and cost required to newly manufacture the entire mold frame.

Mold frame, front frame, fixing groove, fixing member

Description

Liquid crystal display

1 is an exploded perspective view schematically showing a liquid crystal display device according to the present invention;

2 is a perspective view showing a mold frame according to the present invention;

3 is a perspective view showing a coupling state of a mold frame according to a first embodiment of the present invention;

4 is a front view showing a bonding state of the mold frame according to the first embodiment of the present invention;

5 is a perspective view showing a coupling state of a mold frame according to a second embodiment of the present invention;

6 is a perspective view showing a part of a side frame according to a second embodiment of the present invention;

7 is a perspective view showing a part of the front frame according to the second embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

100: liquid crystal display device 200: liquid crystal display module

220: backlight unit 300: case

400: mold frame 410: front frame

420: rear frame 430: side frame

440: guide 450: fixing member

460: fixing groove

The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device having a mold frame in which the front frame is detachable.

Recently, information processing devices have been rapidly developed to have various forms, various functions, and faster information processing speed.

Information processed using such an information processing device has an electrical signal form. In order for the user to visually check the information processed by the information processing device, a display device serving as an interface is required.

Recently, a liquid crystal display device having a light weight, a small size, a full color, high resolution, and the like has been developed as compared with a typical cathode ray tube (CRT) display device. As a result, the liquid crystal display device has become widely used as a display device of computer monitors, home wall-mounted televisions, and other information processing devices, which are representative information processing devices.

Conventional liquid crystal display devices apply voltage to a specific molecular array of liquid crystals to convert them into other molecular arrays, and change the optical properties such as birefringence, photoreactivity, dichroism, and light scattering characteristics of the liquid crystal cell that emit light by such molecular arrangement. It is a display using modulation of light by a liquid crystal cell by converting it into a visual change.

The liquid crystal display device includes a liquid crystal display module and a case for accommodating the liquid crystal display module. The liquid crystal display module also includes a display unit including a liquid crystal display panel for displaying a screen, wherein the display unit includes a liquid crystal display panel, an integrated printed circuit board, a data side tape carrier package, and a gate side flexible circuit board.

The data side tape carrier package is for determining the application time of the data driving signal to the source side of the liquid crystal display panel, and the gate side flexible circuit board is for determining the application time of the driving signal of the gate. In addition, the integrated printed circuit board receives an image signal from the outside of the liquid crystal display panel and applies a driving signal to the gate line and the data line.

In the module process of the liquid crystal display, a data side tape carrier package and a gate side flexible circuit board are connected to a liquid crystal display panel representing a screen, and an integrated printed circuit board is connected to the data side tape carrier package. In addition, they are fixedly supported by a mold frame which is a storage container. The mold frame has a box shape of a rectangular parallelepiped and an upper surface thereof is opened. That is, the frame is composed of four directions.

Hereinafter, a method of mounting the integrated printed circuit board and the data side tape carrier package to the mold frame will be described.

The integrated printed circuit board and the data-side tape carrier package are fixedly supported on one side of the mold frame, and are typically located below the liquid crystal display panel in order to miniaturize the liquid crystal display device.

The data side tape carrier package is bent along the outer side of the mold frame to position the integrated printed circuit board under the liquid crystal display panel. Since the data side tape carrier package is a kind of flexible circuit board, it has a property of being easily bent.

When the data side tape carrier package is bent, the integrated printed circuit board is seated on the bottom side of the mold frame, and the data side tape carrier package is located along the outer side of the mold frame in a bent state.

In this case, the mold frame has a shape capable of preventing the data side tape carrier package and the integrated printed circuit board from being mounted on the mold frame to be separated from a predetermined position. Therefore, when the shape of the data side tape carrier package or the integrated printed circuit board is changed, the mold frame must also be changed to correspond to the new shape.

In particular, since the mold frame is integrally formed in four directions, the entire mold frame must be newly produced even when the number of data-side tape carrier packages is changed due to the difference in resolution or the outer shape of the integrated printed circuit board is changed. .

In the case of liquid crystal display devices having different sizes, it is not a problem because the size of the entire mold frame is different. Instead of replacing only the frame in the direction in which the carrier package or integrated printed circuit board is seated, the entire mold frame must be newly manufactured.

This wastes a lot of money and time spent designing and manufacturing a new mold frame.

An object of the present invention is to provide a liquid crystal display device having a mold frame which can be easily changed in shape according to the change in the shape of the display unit.

Still other objects of the present invention will become more apparent from the following detailed description and the accompanying drawings.

According to the present invention, a liquid crystal display device and a liquid crystal display panel for providing a screen;

A driving circuit unit including a printed circuit board and a plurality of tape carrier packages electrically connecting the liquid crystal display panel and the printed circuit board to drive the liquid crystal display panel, and a mold frame fixing the driving circuit unit. The mold frame may include a front frame in which the printed circuit board and the tape carrier packages are located, a rear frame positioned to face the front frame, and a plurality of side surfaces connecting both ends of the front frame and the rear frame, respectively. And frames, wherein the front frame is removable from the lateral frame.

The front frame may separate the printed circuit board and each of the tape carrier packages from a predetermined position when the printed circuit board and the tape carrier packages connected to the liquid crystal display panel are seated on the mold frame. It may be provided with a plurality of guides that can be prevented.

A fixing groove is formed at an end of the side frame connected to the front frame, and the front frame may have a fixing member inserted into the fixing groove.

The fixing member has a horizontal portion extending in the longitudinal direction of the front frame, and a vertical portion extending in the vertical direction of the front frame to be perpendicular to the horizontal portion, the fixing groove is a horizontal groove corresponding to the horizontal portion And a vertical groove corresponding to the vertical portion, and the horizontal frame and the horizontal groove and the vertical portion and the vertical groove may be coupled to each other by moving the front frame in the longitudinal direction of the lateral frame.

At least one fixing groove may be formed on an upper surface of the side frame, and the fixing member may be located on a lower surface of the front frame corresponding to the fixing groove.

Hereinafter, exemplary embodiments of the present invention will be described in more detail with reference to FIGS. 1 to 7. Embodiment of the present invention may be modified in various forms, the scope of the present invention should not be construed as limited to the embodiments described below. This embodiment is provided to explain in detail the present invention to those skilled in the art. Accordingly, the shape of each element shown in the drawings may be exaggerated to emphasize a more clear description.

1 is an exploded perspective view schematically illustrating a liquid crystal display device 100 according to the present invention.

Referring to FIG. 1, the liquid crystal display device 100 includes a liquid crystal display module 200 and a case 300 for displaying an image by applying an image signal, and the case 300 includes a liquid crystal display module 200. And a front case 310 and a rear case 320 for accommodating the same.

The liquid crystal display module 200 includes a display unit 210 including a liquid crystal display panel 212 representing a screen.

The display unit 210 includes a liquid crystal display panel 212, an integrated printed circuit board 214, a data side tape carrier package 216 (Tape Carrier Package: TCP), and a gate side flexible circuit board 218 manufactured by a COF method. (flexible printed circuit (TCP)). The integrated printed circuit board 214, the data side tape carrier package 216, and the gate side flexible circuit board 218 drive the liquid crystal display panel 212 and are defined as driving circuit units.

The liquid crystal display panel 212 includes a thin film transistor substrate 212a, a color filter substrate 212b, and a liquid crystal (not shown).

The thin film transistor substrate 212a is a transparent glass substrate on which a thin film transistor is formed on a matrix. 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 the electrical signals needed to form the pixels.

The color filter substrate 212b is provided to face the thin film transistor substrate 212a. The color filter substrate 212b 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 212b.

When power is applied to the gate terminal and the source terminal of the transistor of the thin film transistor substrate 212a 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 212b. Such an electric field changes the arrangement angle of the liquid crystal injected between the thin film transistor substrate 212a and the color filter substrate 214b 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 212 and when the liquid crystal is arranged. As shown in the figure, a data tape carrier package 216, which is a type of flexible circuit board that determines the timing of applying the data driving signal, is attached to the source side of the liquid crystal display panel 212, and the timing of applying the driving signal of the gate to the gate side. A gate-side flexible circuit board 218 fabricated by a chip-on-film (COF) method for determining is attached.

The integrated printed circuit board 214 for receiving an image signal from the outside of the liquid crystal display panel 212 and applying a driving signal to the gate line and the data line is a data-side tape carrier package on the data line side of the liquid crystal display panel 212. 214 is connected. The integrated printed circuit board 214 receives an image signal generated from an external information processing apparatus (not shown) such as a computer, and provides a source portion and a liquid crystal display panel 212 to provide a data driving signal to the liquid crystal display panel 212. A gate portion for providing a gate driving signal is formed in the gate line of the gate line. That is, the integrated printed circuit board 214 generates a gate driving signal, a data signal for driving the liquid crystal display, a plurality of timing signals for applying these signals at an appropriate time, and the gate driving signal is a gate-side flexible signal. The circuit board 218 is applied to the gate line of the liquid crystal display panel 212, and the data signal is applied to the data line of the liquid crystal display panel 212 through the data side tape carrier package 216.

The backlight unit 220 is provided below the display unit 210 to provide uniform light to the display unit 210. The backlight unit 220 includes a lamp 222 provided at one side of the liquid crystal display module 200 to generate light. The light guide plate 224 has a size corresponding to the liquid crystal display panel 212 of the display unit 210 and is positioned below the liquid crystal display panel 212 so that the lamp 222 side is thicker and farther from the lamp 222. It is formed thinner and guides the light generated by the lamp 222 toward the display unit 210 to change the path of the light.

A plurality of optical sheets 226 are provided on the light guide plate 224 to uniform the luminance of light emitted from the light guide plate 224 and directed toward the liquid crystal display panel 212. In addition, a light reflector 228 is provided under the light guide plate 224 to reflect light leaking from the light guide plate 224 to the light guide plate 224 to increase the light efficiency.

The display unit 210 and the backlight unit 220 are fixedly supported by the mold frame 400 which is a storage container. The mold frame 400 will be described later.

While the integrated printed circuit board 214 and the gate side flexible circuit board 218 of the display unit 210 are bent to the outside of the mold frame 400, the display unit 210 is fixed to the bottom surface of the mold frame 400. A chassis 330 is provided to prevent it from falling off. The chassis 330 has a rectangular parallelepiped shape like the mold frame 400, and the upper surface portion is opened to expose the liquid crystal display panel 212, and the sidewall portion is bent in an inner vertical direction to form an upper surface of the liquid crystal display panel 212. Cover the perimeter.

2 is a perspective view showing a mold frame 400 according to the present invention.

The mold frame 400 includes a front frame 410, a rear frame 420, and two side frames 430.

An integrated printed circuit board 214 and a data side tape carrier package 216 are located in the front frame 410. The front frame 410 includes a horizontal frame 411 extending laterally, and a vertical frame 412 extending to one side from both ends of the horizontal frame 411.

Also, the rear frame 420 is positioned to face the front frame 410, and the side frames 430 connect both ends of the front frame 410 and the rear frame 420, respectively.

The mold frame 400 has a rectangular parallelepiped box shape by the front frame 410, the rear frame 420, and the side frames 430, and the inside of the mold frame 400 exposes the liquid crystal display panel 212. It is open to make.

The front frame 410 may include a plurality of guides 414 and 416 and guide tips 440.

The data side tape carrier package 216 is bent along the outer surface of the front frame 410 and positioned on the front frame 410, and the integrated printed circuit board 214 connected to one side of the data side tape carrier package 216. Seats on the back of the front frame 410.

At this time, the seated integrated printed circuit board 214 should be seated in a predetermined position. However, when an external force is applied, the integrated printed circuit board 214 may deviate from the preset position. Thus, the front frame 410 is provided with a plurality of guides (414, 416) to prevent this.

The first guide 414 is spaced apart from the horizontal frame 411 by a predetermined distance and is connected to both ends of the vertical frame 412. The first guide 414 is for preventing the integrated printed circuit board 214 from moving toward the liquid crystal display panel 212 by moving in the vertical direction.

A plurality of second guides 416 are installed at a predetermined distance from the vertical frame 412. The second guide 416 is provided to prevent the integrated printed circuit board 214 from moving out of the preset position by moving left and right. The second guide 416 also serves to interconnect the first guide 414 and the horizontal frame 411.

The guide tip 440 is installed on the horizontal frame 411.

To seat the integrated printed circuit board 214 on the front frame 410, the data side tape carrier package 216 must be bent along the horizontal frame 411. The bent data side tape carrier package 216 may also be out of the preset position by external force, like the integrated printed circuit board 214.

The guide tip 440 serves to guide the bent data side tape carrier package 216 at the predetermined position so as not to deviate from the preset position. The guide tip 440 is installed on the horizontal frame 411, and may be installed according to the number of data-side tape carrier packages 216.

3 is a perspective view illustrating a coupling state of the mold frame 400 according to the first embodiment of the present invention, and FIG. 4 is a front view illustrating the coupling state of the mold frame 400 according to the first embodiment of the present invention.

As shown in FIG. 3, the front frame 410 includes a fixing member 450. The fixing member 450 includes a horizontal portion 452 extending in the longitudinal direction from both sides of the front frame 410, and a vertical portion 454 extending in the vertical direction of the front frame 410 to be perpendicular to the horizontal portion. . The horizontal portion 452 and the vertical portion 454 may be integrally formed.

The fixing groove 460 is formed at the end of the side frame 430. The fixing groove 460 includes a horizontal groove 462 corresponding to the horizontal portion 452 and a vertical groove 464 corresponding to the vertical portion 454. The horizontal groove 462 and the vertical groove 464 are formed to extend in the longitudinal direction of the side frame 430.

The front frame 410 having the fixing member 450 may be coupled to the side frame 430 by moving from the bottom of the side frame 430 in the longitudinal direction, that is, from the bottom of the mold frame 400 to the top. The horizontal portion 452 and the vertical portion 454 of the fixing member 450 are sliding on the horizontal groove 462 and the vertical groove 464 of the fixing groove 460, respectively, both of which may be coupled to each other. .

The horizontal portion 452 and the vertical portion 454 of the fixing member 450 and the horizontal groove 462 and the vertical groove 464 of the fixing groove 460 are combined as shown in FIG. 4.

5 is a perspective view illustrating a coupling state of the mold frame 400 according to the second embodiment of the present invention, and FIG. 6 is a perspective view showing a part of the side frame 430 according to the second embodiment of the present invention. 7 is a perspective view showing a part of the front frame 400 according to the second embodiment of the present invention.

As shown in FIG. 5, according to the second embodiment of the present invention, the front frame 410 is coupled by the fixing member 418 of the front frame 410 and the fixing groove 432 of the side frame 430. Can be combined with the side frame 430.

As shown in FIG. 6, at least one fixing groove 432 is formed on an upper surface of the side frame 430. When there are a plurality of side frames 430, the fixing grooves 432 may be formed with respect to each side frame 430.

As shown in FIG. 7, the front frame 410 may further include at least one fixing member 418 positioned on the lower surface of the front frame 410. The fixing member 418 is positioned to correspond to the fixing groove 432.

As shown in FIG. 5, according to the second embodiment of the present invention, the front frame 410 moves from the top of the side frame 430 to the bottom by the pressure applied from the top of the front frame 410. At the same time, each fixing member 418 is inserted into each fixing groove 432, the front frame 410 and the side frame 430 may be combined.

As described above, the front frame 410 according to the present invention is removable from the side frame 430. Thus, when the shape of the integrated printed circuit board 214 or the data side tape carrier package 216 is changed, there is no need to newly manufacture the entire mold frame 400, and the shape of the front frame 410 corresponds to the new shape. Only you can change it.

The new shape front frame 410 may be combined with the lateral frame 430 according to the first embodiment or the second embodiment described above.

According to the present invention, the shape of the mold frame can be easily changed to correspond to the new shape liquid crystal display module.

Claims (5)

In the liquid crystal display device, A liquid crystal display panel providing a screen; A driving circuit unit including an integrated printed circuit board and a plurality of data side tape carrier packages electrically connecting the liquid crystal display panel and the printed circuit board to drive the liquid crystal display panel; Including a mold frame for fixing the drive circuit unit, The mold frame, A front frame in which the printed circuit board and the data side tape carrier packages are located; A rear frame positioned to face the front frame; Comprising a plurality of side frames each connecting both ends of the front frame and the rear frame, And the front frame is detachable from the side frame. The method of claim 1, The front frame may separate the printed circuit board and each of the tape carrier packages from a predetermined position when the printed circuit board and the tape carrier packages connected to the liquid crystal display panel are seated on the mold frame. And a plurality of guides capable of preventing the same. The method according to claim 1 or 2, A fixing groove is formed at the end of the side frame connected to the front frame, The front frame further comprises a fixing member inserted into the fixing groove. The method of claim 3, The fixing member, A horizontal portion extending in the longitudinal direction of the front frame; It has a vertical portion extending in the vertical direction of the front frame to be perpendicular to the horizontal portion, The fixing groove, A horizontal groove corresponding to the horizontal portion; Consists of a vertical groove corresponding to the vertical portion, And the horizontal portion, the horizontal groove, and the vertical portion and the vertical groove are coupled to each other by moving the front frame in the longitudinal direction of the side frame. The method of claim 3, At least one fixing groove is formed on the upper surface of the side frame, And the fixing member is disposed on a lower surface of the front frame corresponding to the fixing groove.

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