KR20060005791A - A liquid crystal display provided with an improved structure of fixing a lamp - Google Patents

Abstract

The present invention relates to a liquid crystal display device for fixing a lamp using an arcuate member. To this end, the liquid crystal display of the present invention includes a liquid crystal display panel assembly including a liquid crystal display panel on which an image is displayed, and a backlight assembly including a lamp for supplying light to the liquid crystal display panel and guiding the light to improve brightness. The backlight assembly further includes a lamp cover surrounding and protecting the lamp, and the arcuate member supporting the lamp is fixed to the lamp outer periphery and fixed to the lamp cover. According to the present invention, when an external impact is applied to the liquid crystal display, damage or detachment of the lamp can be prevented.

Arched member, lamp cover, lamp, opening

Description

Liquid Crystal Display Improved Lamp Fixing Structure {A LIQUID CRYSTAL DISPLAY PROVIDED WITH AN IMPROVED STRUCTURE OF FIXING A LAMP}

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

2 is a partial perspective view of a backlight assembly according to a first embodiment of the present invention.

3 is a partial cross-sectional view taken along line AA of FIG. 2.

4 is a partial perspective view of a backlight assembly according to a second embodiment of the present invention.

FIG. 5 is a partial cross-sectional view taken along line BB of FIG. 4.

The present invention relates to a liquid crystal display device having an improved lamp fixing structure, and more particularly, to a liquid crystal display device in which a lamp is fixed using an arcuate member.

With the recent development of semiconductor technology, which is rapidly developing in recent years, the demand for flat panel display devices that are smaller and lighter and has improved performance is exploding.

The liquid crystal display (LCD), which has recently been in the spotlight among the flat panel display devices, has advantages such as miniaturization, light weight, and low power consumption, thereby overcoming the disadvantages of the conventional cathode ray tube (CRT). As an alternative means, it has been gradually 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 display apparatus which displays information using the modulation of the light by a liquid crystal cell as converting into a change.

Since the liquid crystal display panel in the liquid crystal display device does not emit light by itself, the liquid crystal display panel includes a backlight assembly for providing light to the liquid crystal display panel under the liquid crystal display panel. The backlight assembly includes a lamp, a light guide plate, a reflective sheet, optical sheets, and the like. The lamp uses a cold cathode ray tube lamp that generates relatively little heat, generates white light close to natural light, and has a long lifespan.

Since the lamp is fragile, a lamp holder is attached to both ends of the lamp in order to fix and support it. In addition, as the length of the liquid crystal display device increases, the length of the lamp gradually increases, and thus the possibility of breakage increases. Therefore, an O-ring surrounding the outer circumferential surface of the lamp is attached to each lamp in the middle of the lamp to fix and support the lamp. This prevents the lamp from breaking.

The O-ring has a desirable advantage in terms of holding and holding the lamp. However, the O-ring is fitted in the space between the lamp cover and the lamp and fixed adjacent to the lamp cover and the lamp, so that the shock is not affected even when an external shock is applied to the lamp cover. There is a high possibility that the lamp will break.

In addition, since the light emitted from the lamp in the portion where the O-ring is fixed cannot be transmitted to the liquid crystal display panel because it is blocked by the O-ring, there is a problem in that the vertical dark portion occurs in the liquid crystal display panel during screen display.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and more particularly, to fix the lamp more firmly, to prevent damage caused by external impact, and at the same time to provide a liquid crystal display device capable of removing vertical arm portions generated during screen display.

According to an aspect of the present invention, there is provided a liquid crystal display device including a liquid crystal display panel assembly including a liquid crystal display panel on which an image is displayed, and a lamp for supplying light to the liquid crystal display panel and guiding the light to provide brightness. The backlight assembly further includes a lamp cover for enclosing and protecting the lamp, wherein an arch-shaped member fixed to the lamp periphery to support the lamp is fixedly connected to the lamp cover.

Here, the backlight assembly further includes a light guide plate for guiding light emitted from the lamp, and the arcuate member is preferably opened in the light guide plate direction.

In addition, one side of the lamp cover adjacent to the light guide plate and the arcuate member are preferably spaced apart from each other.

The arcuate members may be spaced apart from each other by a predetermined distance along the longitudinal direction of the lamp.

The arcuate member preferably comprises at least one lamp fixing part for fixing the lamp and a connection part connected to the lamp fixing part and fixed to the lamp cover.

Here, the locking jaw is formed at one end of the connecting portion may be fixed to the opening of the lamp cover.

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.

1 is an exploded perspective view of a liquid crystal display device 100 according to a first embodiment and a second embodiment of the present invention.

1 includes a backlight assembly 50 for supplying light and a liquid crystal display panel assembly 40 for displaying an image corresponding to the light. In addition, a top chassis 60, an upper mold frame 52, a bottom chassis 58, and a lower mold frame 49 are combined to fix and support them. The wedge shaped backlight assembly shown in FIG. 1 is merely for illustrating the present invention, and the present invention is not limited to this structure. Therefore, the present invention can also be applied to liquid crystal display devices having other structures, such as edge type.

The backlight assembly 50 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 50 has a liquid crystal display in which an image is displayed. The panel 65 is controlled.

The liquid crystal display panel assembly 40 includes a liquid crystal display panel 65, a tape carrier package (TCP) 41 and 43, and a printed circuit board 42 and 44. Here, the liquid crystal display panel 65 is injected between a TFT substrate 61 composed of a plurality of TFTs (thin film transistors), a color filter substrate 63 positioned on the TFT substrate 61, and the substrates. It is made of liquid crystal (not shown).

The TFT substrate 61 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 input from the printed circuit boards 42 and 44 to the data lines and the gate lines of the liquid crystal display panel 65 described above, electrical signals are input to the source and gate terminals of the TFT, Depending on the input, the TFT is turned on or turned off so that an electrical signal necessary for pixel formation is output to the drain terminal.

On the other hand, a color filter substrate 63 is disposed thereon opposite the TFT substrate 61. The color filter substrate 63 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 61 and the color filter substrate 63 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 angle of the liquid crystals of the liquid crystal display panel 65 and the timing at which the liquid crystals are arranged, a driving signal and a timing signal are applied to the gate line and the data line of the TFT. The data driving signal is applied to the source side of the liquid crystal display panel 65. A data TCP 43 for determining the application timing of the data is attached, and a gate TCP 41 is attached to the gate side for determining the application timing of the gate driving signal.

The data PCB 44 and the gate PCB 42 for receiving image signals from the outside of the liquid crystal display panel 65 and applying driving signals to the data lines and the gate lines, respectively, are provided on the gate line side of the liquid crystal display panel 65. Connection is made with the gate TCP 41 and the data TCP 43 on the data line side, respectively.

The data PCB 44 and the gate PCB 42 generate data signals, gate driving signals, which are signals for driving the liquid crystal display device 100, and a plurality of timing signals for applying these signals at appropriate times, respectively. The gate driving signal is applied to the gate line of the liquid crystal display panel 65 through the gate TCP 41, and the data signal is applied to the data line of the liquid crystal display panel 65 through the data TCP 43.

The backlight assembly 50 is provided under the liquid crystal display panel assembly 40 to provide uniform light to the liquid crystal display panel assembly 40.

The backlight assembly 50 is accommodated and fixed on the bottom chassis 58, and is positioned on the bottom chassis 58 to provide light to the light guide plate 56 and the liquid crystal display panel 65 to guide the light. (14) (the same as shown in FIG. 2, hereinafter), the lamp cover 12 to surround and protect the lamp 14, the optical sheet 54 for supplying light with improved brightness to the liquid crystal display panel 65, the bottom And a reflective sheet 59 attached to the chassis 58 to reflect light.

Although not shown in FIG. 1, an inverter board, which is a power supply PCB, and a signal conversion PCB are installed on the bottom of the bottom chassis 58. The inverter board transforms the external power to a constant voltage level to provide the lamp, and the signal conversion PCB is connected to the aforementioned data PCB 44 and the gate PCB 42 to convert analog data signals into digital data signals and to display liquid crystal displays. The panel 65 is provided.

Preventing the liquid crystal display panel assembly 40 from being separated from the bottom chassis 58 while bending the data PCB 44 and the gate PCB 42 out of the upper mold frame 52 on the liquid crystal display panel assembly 40. It has a top chassis 60 for. The top chassis 60 is coupled to the outer surface of the lower mold frame 49 surrounding the edge of the bottom chassis 58. Although not shown in FIG. 1, a front case and a rear case are positioned at an upper portion of the top chassis 60 and a lower mold frame 49 to form a liquid crystal display device 100 by combining them.

FIG. 2 is a partial perspective view of a backlight assembly according to a first embodiment of the present invention, and illustrates a connection relationship between one lamp 14 and a lamp cover 12.

The lamp 14 facing one side of the light guide plate 56 is fixed to the lamp holder 16 at both ends thereof, and is spaced apart from each other by a predetermined distance along the longitudinal direction of the lamp 14 to the outer periphery of the lamp 14. It is supported by a first arcuate member 10 that is fixed in number. Therefore, even in the case of the lamp 14 of long length can not only prevent sag, but also has a strong advantage against external impact.

3 is a partial cross-sectional view taken along the line AA of FIG. 2, and is a cross-sectional view taken along the line AA after combining the components shown in FIG. 2.

The first arcuate member 10 is a deformation of the O-ring, and can be easily formed by opening a partial arc of the O-ring toward the light guide plate 56. Since the first arcuate member 10 is opened in the direction of the light guide plate 56, light emission from the lamp 14 is smoothly performed even at the portion where the first arcuate member 10 is attached. Does not appear. In addition, since the first arcuate member 10 is made of a resin material, not only the material cost is low but also the color can be made close to transparent, thereby increasing the light transmittance.

As shown in FIG. 3, one side of the lamp cover 12 adjacent to the light guide plate 56, that is, the upper and lower surfaces opposite to the first arcuate member 10 is positioned to be spaced apart from each other. As a result, even when the lamp cover 12 is pressed by an external impact, a free space is secured, and the impact is not transmitted to the lamp 14. Instead, the lamp 14 is fixed by connecting and fixing one end of the first arcuate member 10 to the opening 122 in the lamp cover 12.

The first arcuate member 10 includes one lamp fixing portion 102 for fixing the lamp 14, and a connecting portion 104 connected to the lamp fixing portion 102 and fixed to the lamp cover 12. . A hooking jaw is formed at one end 106 of the connecting portion 104, and the connecting portion 104 is fixed to the opening 122 of the lamp cover 12. Due to the structural features of the first arcuate member 10, the lamp 14 may be firmly fixed to the lamp cover 12.

4 is a partial perspective view of a backlight assembly according to a second exemplary embodiment of the present invention, and illustrates a connection relationship between two lamps 20 and a lamp cover 122.

The backlight assembly according to the second embodiment of the present invention is the same as the backlight assembly according to the first embodiment of the present invention, except that two lamps 14 and a second arcuate member 20 corresponding thereto are used. . Therefore, the same parts are shown using the same reference numerals, and the same parts as the first embodiment of the present invention will not be described in detail. In particular, although FIG. 4 shows two lamps, this is for illustrative purposes only and is not intended to limit the invention. Therefore, more than two lamps may be used.

When two lamps 14 are used as shown in FIG. 4, the lamps 14 are harder by using the second arcuate member 20 having a shape capable of simultaneously fixing the two lamps 14. To be fixed.

FIG. 5 is a partial cross-sectional view taken along the line BB of FIG. 4, and is a cross-sectional view taken along the line BB after combining the components shown in FIG. 4.

As shown in FIG. 5, the second arcuate member 20 is connected to two lamp fixing portions 202 for fixing the lamp 14 and the lamp fixing portion 202 and fixed to the lamp cover 12. Connector 204. A hooking jaw is formed at one end 206 of the connecting portion 204, and the connecting portion 204 is fixed to the opening 122 of the lamp cover 12. The second arcuate member 20 allows the lamp 14 to be firmly fixed to the lamp cover 12.

As described above, the liquid crystal display according to the present invention is fixed to the outer periphery of the lamp, and the arcuate member supporting the lamp is fixed to the lamp cover, thereby preventing damage or breakage of the lamp from external impact.

In addition, since the arcuate member is opened in the direction of the light guide plate, it is possible to prevent the generation of the longitudinal dark portion of the liquid crystal display panel due to the arc-shaped member.

In addition, since one side and the arcuate member of the lamp cover adjacent to the light guide plate are located at one side, the arcuate member is not deformed even when the lamp cover is externally impacted, and there is no need to worry about the shock transmitted to the lamp. .

Since the arcuate members are fixed to be spaced apart from each other at a predetermined distance along the longitudinal direction of the lamp, not only can the lamp be prevented from sagging but also the lamp is less likely to be broken during an external impact.

The arcuate member includes at least one lamp fixing part for fixing the lamp and a connection part connected to the lamp fixing part and fixed to the lamp cover, so that even when using a plurality of lamps, the lamp fixing part can be properly formed to secure the lamp. have.

Since the locking jaw is formed at one end of the connection portion of the arcuate member and the connection portion is fixed to the opening of the lamp cover, the assembly can be easily and firmly fixed when fixing the lamp cover.

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 (6)

A liquid crystal display panel assembly including a liquid crystal display panel on which an image is displayed, and A backlight assembly including a lamp for supplying light to the liquid crystal display panel and guiding the light to improve brightness Including, The backlight assembly further includes a lamp cover surrounding and protecting the lamp, wherein an arch-shaped member fixed to an outer circumference of the lamp to support the lamp is connected to and fixed to the lamp cover. In claim 1, The backlight assembly further includes a light guide plate for guiding light emitted from the lamp, wherein the arcuate member is opened toward the light guide plate. In claim 1, The backlight assembly further includes a light guide plate for guiding light emitted from the lamp, wherein one side of the lamp cover adjacent to the light guide plate and the arcuate member are spaced apart from each other. In claim 1, And the arcuate members are spaced apart from each other by a predetermined distance along the longitudinal direction of the lamp. In claim 1, The arcuate member includes at least one lamp fixing part for fixing the lamp and a connection part connected to the lamp fixing part and fixed to the lamp cover. In claim 5, A latching jaw is formed at one end of the connection part such that the connection part is fixed to the opening of the lamp cover.

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