KR20080049887A - Liquid crystal display - Google Patents

Abstract

An LCD is provided to form a connector, for being fastening with a lamp wire, by installing an inverter circuit within a PCB(Printed Circuit Board), thereby preventing short of the lamp wire and simplifying its structure. An LCD(Liquid Crystal Display) panel implements images. A backlight unit(300) includes a lamp for providing light to the LCD panel, and lamp wire(325a,325b) respectively connected with both ends of the lamp. A driving unit(200) drives the LCD panel and has connectors(522,524) fastened with the lamp wire. In the driving unit, an inverter driving chip(500) is mounted. The inverter driving chip converts power into voltage suitable for driving of the lamp through the connector. A mold frame contains the backlight unit and the driving unit.

Description

Liquid Crystal Display {LIQUID CRYSTAL DISPLAY}

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

2 is a cross-sectional view for illustrating a liquid crystal display device according to the present invention.

<Brief description of symbols for the main parts of the drawings>

100: liquid crystal display panel 110: thin film transistor substrate

120: color filter substrate 200: panel driver

210: tape carrier package 230: driving chip

250: printed circuit board 300: backlight unit

310: lamp 320: lamp holder

325a, 325b: lamp wire 330: light guide plate

335: reflection sheet 340: diffusion sheet

350: prism sheet 360: protective sheet

410: mold frame 412: groove

500: Inverter drive chip 522: First female connector

524: the second female connector

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device capable of simplifying disconnection and structure of a lamp wire.

A liquid crystal display (LCD) is a device for displaying a desired image by adjusting the light transmittance of liquid crystal cells arranged in a matrix form according to image signal information. The liquid crystal display is a flat panel display device, which is thin and light, has a low power consumption and a low driving voltage, and thus is widely used in various electronic devices.

In general, a liquid crystal display device includes a liquid crystal display panel for displaying an image, a driving unit for driving the liquid crystal display panel, a backlight unit for supplying light to the liquid crystal display panel, and a housing member for accommodating the liquid crystal display panel.

The backlight unit includes a lamp for supplying light and a lamp wire for supplying a voltage to the lamp. The first connector formed at the end of the lamp wire protrudes to the outside and is connected to the second connector disposed on the side of the externally mounted inverter board.

At this time, the lamp wire is disconnected by the impact from the outside of the lamp wire exposed in the process of connecting the mold frame and the inverter. In addition, the lamp wire exposed to the outside has a disadvantage in that the manufacturing cost increases and manufacturing time is increased by using a fixing material such as a tape, and a large amount of space is used by the inverter board to increase the overall size of the liquid crystal display device. . In addition, assembling the lamp wire and the inverter board, assembling the inverter board and the main body, and assembling the driving unit and the main body takes a lot of time to assemble the liquid crystal display device.

Accordingly, an object of the present invention is to provide a liquid crystal display device which can simplify the disconnection and structure of a lamp wire.

In order to achieve the above technical problem, the liquid crystal display device according to the present invention comprises a liquid crystal display panel for implementing an image; A backlight unit having a lamp for providing light to the liquid crystal display panel and lamp wires connected to both ends of the lamp; And a driving unit including an inverter driving chip which drives the liquid crystal display panel and changes the power to a voltage suitable for driving the lamp through the connector, the connector being coupled to the lamp wire.

The display device may further include a mold frame accommodating the liquid crystal display panel, the backlight unit, and the driving unit.

Both sides of the mold frame may be provided with grooves into which the lamp wires are inserted, or lamp wires may be seated along upper surfaces of both sides of the mold frame.

The driver further includes an input connector for receiving data from an external device.

Herein, the connector is formed at each of the upper right and left upper ends of the driving unit, and the input connector is formed at either the lower right or left side of the driving unit.

In order to achieve the above technical problem, the driving unit according to the present invention comprises a data and gate driving chip for driving the liquid crystal display panel; A printed circuit board for driving the liquid crystal display panel and having an inverter driving chip for changing a power supplied from the outside into a voltage suitable for driving a lamp; And a tape carrier package electrically connecting the liquid crystal display panel and the printed circuit board.

In addition to the above technical problem will be apparent from the description of the preferred embodiment of the other technical invention of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. 1 and 2.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. 1 and 2.

1 is an exploded perspective view for showing a liquid crystal display device according to the present invention, Figure 2 is a cross-sectional view for showing a liquid crystal display device according to the present invention.

1 and 2 are exploded perspective views showing a liquid crystal display device according to the present invention.

1 and 2 include a liquid crystal display panel 100 for displaying an image, a backlight unit 300 for generating light, and a backlight unit 300 to accommodate first and second lamp wires. Mold frame 410 to accommodate the (325a, 325b), the driving unit 200 for supplying power to the lamp wires (325a, 325b) as well as driving the liquid crystal display panel 100, the liquid crystal display panel 100 ), And a housing member (not shown) for accommodating the backlight unit 300 and the mold frame 410.

The liquid crystal display panel 100 includes a liquid crystal (not shown) for adjusting the light transmission amount, a color filter substrate 110 and a thin film transistor substrate 120 bonded together with the liquid crystal interposed therebetween.

The color filter substrate 110 may have a black matrix for preventing light leakage on a transparent insulating substrate such as glass or plastic, a color filter for implementing color, and a common electric field to form a vertical electric field with a pixel electrode formed on the thin film transistor substrate 120. An electrode and an alignment film formed thereon for alignment of the liquid crystal.

The thin film transistor substrate 120 includes a gate line and a data line intersecting each other on a transparent insulating substrate such as glass or plastic, a thin film transistor formed at an intersection of the gate line and the data line, and a pixel electrode connected to the thin film transistor. And an alignment film formed thereon for alignment of liquid crystals.

The driving unit 200 is connected to one side of the thin film transistor substrate 120 to supply driving signals to gates and data lines of the liquid crystal display panel 100. The driver 200 includes a gate driving circuit chip (hereinafter referred to as an “IC”) for driving a gate line formed in the liquid crystal display panel 100, a data driving circuit chip 230 for driving a data line, and a power supply. The inverter driving chip 500 changes the voltage to a voltage suitable for driving the lamp 310.

The gate driving chip may be mounted on the thin film transistor substrate 120 in the form of a chip on glass (COG) or integrated on the thin film transistor substrate 120. The tape carrier package may be mounted on a tape carrier package (hereinafter referred to as "TCP") in the form of a film and electrically connected to the liquid crystal display panel 100 through a tape carrier package bonding process. The gate driving chip receives a timing signal and a power signal supplied from the printed circuit board 250 to generate a gate driving signal and supply the gate driving signal to the gate line.

The data driving chip is mounted on the thin film transistor substrate 120 or directly on the thin film transistor substrate 12. The data driving chip 230 is mounted on a data tape carrier package 210 in a film form and electrically connected to the thin film transistor substrate 120 through a tape carrier package bonding process. The data driving chip 230 receives a timing signal, an image signal, and a power signal applied from the printed circuit board 250 through a signal line formed on the data tape carrier package 210 to generate a data driving signal and transmits the data driving signal to the data line. Supply.

The inverter driving chip 500 changes the power input from the outside to a voltage suitable for driving the lamp 310 to obtain a light source from the lamp 310. That is, the inverter driving chip 500 receives a DC voltage from the outside and converts it into an AC voltage, and boosts the converted AC voltage to several hundred volts to drive the lamp 310. The inverter driving chip 500 is mounted on one side of the lower left side or the lower right side of the printed circuit board 250. The inverter driving chip 500 according to the present invention may be mounted on the thin film transistor substrate 120 or directly on the thin film transistor substrate 120. Alternatively, the inverter driving chip 500 may be electrically connected to the thin film transistor substrate 120 through the data tape carrier package 210 in the form of a film.

The printed circuit board 250 is electrically connected to the thin film transistor substrate 120 through the tape carrier package 210. To this end, a plurality of electronic devices (not shown) for generating a power signal, a data signal, and various control signals are mounted on the printed circuit board 240 in a soldering manner. Here, the power signal, the data signal, and various control signals generated by each electronic device are supplied to the thin film transistor substrate 120 through the tape carrier package 210 to supply the scan signal and the image signal.

In addition, the printed circuit board 240 is provided with a space for mounting the input connector 530 and the inverter driving chip 500 for receiving data from the outside. The printed circuit board 240 includes first and second female connectors 522 and 524 that provide a high voltage or a low voltage to each of the upper left and upper right sides of the other side facing the one side on which the inverter driving chip 500 is mounted. The first and second male connectors 370a and 370b formed at the ends of the lamp wire 325 are fastened and electrically connected to each other. At this time, if the first and second female connectors 522 and 524 of the printed circuit board 250 are male connectors, the first and second male connectors 370a formed at the ends of the first and first lamp wires 325a and 325b. 370b is a female connector.

The backlight unit 300 is formed under the liquid crystal display panel 100 and supplies light to the liquid crystal display panel 100. The backlight unit 300 may include a lamp 310 for generating light and first and second lamp wires 325a and 325b formed at both ends of the lamp 310 to supply voltage from the inverter driving chip 500. Include.

At least one lamp 310 is formed in the lamp holder 320 to generate light.

The lamp wires 325a and 325b are provided with a first lamp wire 325a for providing the high voltage side and a second lamp wire 325b for supplying the low voltage side voltage, and the first and second lamp wires 325a and 325b are provided. ) Is formed of at least two wires. First and second male connectors 370a fastened to first and second female connectors 522 and 524 formed on the printed circuit board 250 for supplying voltage at ends of the first and second lamp wires 325a and 325b. 370b) is formed.

The first lamp wire 325a connected to one side of the lamp 310 is inserted into one side of the groove 412 formed in the mold frame 410, and the second lamp wire 325b connected to the other side of the lamp 310 is molded. It is inserted into the other side of the groove 412 formed in the frame 410. Thereafter, the first and second lamp wires 325a and 325b inserted into both sides meet on the printed circuit board 250 and are connected to each of the first female connector 522 and the second female connector 524. In this case, the first and second lamp wires 325a and 325b may be mounted in the grooves 412 formed inside the mold frame 410, thereby preventing shock and interference from the outside and displaying a neat image in appearance. Alternatively, the first lamp wire 325a connected to one side of the lamp 310 is seated along one side edge of the mold frame 410, and the second lamp wire 325b connected to the other side of the lamp 310 is a mold frame. It may be seated along the other short side edge of the (410).

Here, the backlight unit 300 may include a light guide plate 330 for guiding the light generated by the lamp 310, a reflection sheet 335 for reflecting the light flowing out of the lower portion of the light guide plate 330 onto the light guide plate 330. A diffusion sheet 340 for scattering and diffusing the light supplied by the light guide plate 330, and a prism sheet 350 and a prism sheet 350 for condensing the light diffused through the diffusion sheet 340 to improve luminance. It is formed on the upper side of the protection sheet 360 to further protect the sheet to dust or scratch (Scratch) and prevent the flow of the sheet further comprises.

The mold frame 410 accommodates the liquid crystal display panel 100, the backlight unit 300, and the driver 200. The mold frame 410 includes sidewalls and a bottom surface to provide an accommodating part. The backlight unit 300 is accommodated and fixed in the accommodating part of the mold frame 410, and the liquid crystal display panel 100 and the driving part 200 are seated and accommodated in the upper part of the backlight unit 300. The mold frame 410 has a groove 412 into which the lamp wire 325 is inserted. The groove 412 is formed in the side wall of the mold frame 410 adjacent to the lamp 310. The groove 412 may prevent the flow of the first and second lamp wires 325a and 325b by inserting the first and second lamp wires 325a and 325b.

The top chassis 500 is formed to surround the upper edge of the liquid crystal display panel 100 to fix the liquid crystal display panel 100. The top chassis 500 covers the sidewalls of the mold frame 410 and fixes the mold frame 410. The top chassis 500 prevents the liquid crystal display panel 100 and the backlight unit 300 from being damaged by an external impact, and fixes the liquid crystal display panel 100 and the mold frame 410 to prevent damage due to flow. do.

The bottom chassis (not shown) is fastened to the top chassis 500 to protect the liquid crystal display panel 100, the driver 200, and the backlight unit 300 from external pressure.

Accordingly, in the liquid crystal display according to the present invention, the inverter driving chip 500 is mounted on the printed circuit board 250 and the first and second numbers are formed at the ends of the first and second lamp wires 325a and 325b. By forming the first and second female connectors 522 and 524 to be coupled to the connectors 370a and 370b, a manufacturing cost may be reduced by not separately providing an existing inverter board. In addition, in the liquid crystal display device, since the first and second lamp wires 325a and 325b are seated inside the mold frame 410 and are not exposed to the outside, disconnection failure due to external pressure may be prevented.

As described above, the liquid crystal display according to the present invention includes an inverter circuit in a printed circuit board to form a connector for fastening the lamp wire, thereby simplifying disconnection and structure of the lamp wire.

Accordingly, the liquid crystal display according to the present invention prevents the lamp wire exposed to the outside from increasing the manufacturing cost and increasing the manufacturing time by using a fixing material such as a tape. By providing an inverter board, a lot of space is used to solve the disadvantage of increasing the overall size of the liquid crystal display. In addition, the liquid crystal display device requires a lot of time during the assembly process of the liquid crystal display device through a plurality of assembling processes such as a process of fastening the lamp wire and the inverter board, a process of connecting the inverter board and the main body, and a process of connecting the drive unit and the main body. The assembly process can be shortened by reducing the fastening process by forming the inverter circuit in the printed circuit board.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the description of the specification but should be defined by the claims.

Claims (12)

A liquid crystal display panel for implementing an image; A backlight unit having a lamp for providing light to the liquid crystal display panel and lamp wires connected to both ends of the lamp; And And a driving unit having an inverter driving chip mounted thereon to drive the liquid crystal display panel and to change a power supply to a voltage suitable for driving the lamp through the connector. Display. The method of claim 1, And a mold frame accommodating the liquid crystal display panel, the backlight unit, and the driving unit. The method of claim 2, And a groove into which the lamp wire is inserted at both short sides of the mold frame. The method of claim 2, And a lamp wire seated along upper surfaces of both sides of the mold frame. The method of claim 1, The driving unit further comprises an input connector for receiving data from an external device. The method of claim 5, wherein And the connector is formed on each of an upper right side and an upper left side of the driving unit. The method of claim 6, And the input connector is formed at any one of a lower right side and a left side of the driving unit. Data and gate driving chips for driving the liquid crystal display panel; A printed circuit board for driving the liquid crystal display panel and having an inverter driving chip for changing a power supplied from the outside into a voltage suitable for driving a lamp; And And a tape carrier package electrically connecting the liquid crystal display panel and the printed circuit board. The method of claim 8, And a connector formed on the printed circuit board to be electrically connected to the lamp. The method of claim 9, The printed circuit board is a driving unit, characterized in that an input connector for receiving data from the outside is formed. The method of claim 10, The input connector is a drive unit, characterized in that formed in any one of the lower right or left side of the printed circuit board. The method of claim 11, The connector is formed in each of the upper right and left upper portion of the printed circuit board.

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