KR20070120759A - Liquid crystal display - Google Patents

Abstract

An LCD is provided to emit the heat generated from a driving circuit efficiently, by forming a plurality of holes in a housing case so that the driving circuit is easily contacted with external air. A panel assembly(130) includes an LCD panel(136), and tape carrier packages(131,132) electrically connected to the LCD panel to transfer driving signals to the LCD panel. A backlight unit(140) is positioned below the LCD panel assembly, and supplies light to the LCD panel assembly. A lower housing case(160) includes a plurality of lateral walls for housing the LCD panel assembly and the backlight unit, and a support portion(162) protruded and extended from at least one of the lateral walls to support the tape carrier packages. A plurality of holes(161) are formed in the support portion of the lower housing case correspondingly to the tape carrier packages. An upper housing case(110) is correspondingly joined to the lower housing case above the LCD panel assembly.

Description

Liquid crystal display

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

FIG. 2 is a cross-sectional view taken along line AA ′ of the liquid crystal display of FIG. 1.

(Explanation of symbols for the main parts of the drawing)

100: liquid crystal display device 110: upper storage container

130: liquid crystal panel assembly 131: gate tape carrier package

132: data tape carrier package 133: thin film transistor array panel

134: common electrode display panel 135: printed circuit board

136: liquid crystal panel 138: driving circuit

140: backlight unit 141: optical sheets

142: diffuser plate 143: lamp assembly

144: reflector 150: intermediate storage container

151: second holes 160: lower storage container

161: first holes 162: support

The present invention relates to a liquid crystal display device having an improved heat dissipation structure, and more particularly, to a liquid crystal display device for dissipating heat generated from a driving circuit to the outside.

Liquid Crystal Display (Liquid Crystal Display) replaces the existing Cathode Ray Tube (CRT) and is used as a flat panel display device. It is applied to various fields. This is because there are advantages such as small size, light weight and low power consumption.

In recent years, the precision of a liquid crystal display device has increased in temperature during driving of the liquid crystal display device due to an increase in the number of channels and a driving frequency of the driving circuit. This is because in the structure of the conventional storage container, thermal energy cannot be smoothly discharged to the outside. This can lead to degradation of the driving circuit.

SUMMARY OF THE INVENTION The present invention has been made in an effort to provide a liquid crystal display device capable of emitting heat generated from a driving circuit to the outside by improving a heat dissipation structure of a liquid crystal display device.

Technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, a liquid crystal panel includes a liquid crystal panel and a tape carrier package electrically connected to the liquid crystal panel to transfer driving signals to the liquid crystal panel. Located in the lower part of the assembly, the backlight unit for supplying light to the liquid crystal panel assembly, a plurality of side walls for accommodating the liquid crystal panel assembly and the backlight unit therein, and bent to protrude from at least one side wall of the plurality of side walls to the tape carrier package The support unit includes a support unit, wherein the predetermined area of the support unit corresponding to the tape carrier package includes a lower storage container having a plurality of first holes and an upper storage container corresponding to the lower storage container at an upper portion of the liquid crystal panel assembly.

Specific details of other embodiments are included in the detailed description and drawings.

Advantages and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various forms. It is provided to fully convey the scope of the invention to those skilled in the art, and the invention is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

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

1 is an exploded perspective view illustrating a liquid crystal display according to an exemplary embodiment of the present invention. FIG. 2 is a cross-sectional view taken along line AA ′ of the liquid crystal display of FIG. 1.

1 and 2, the liquid crystal display device 100 according to the exemplary embodiment of the present invention generally has a liquid crystal panel assembly 130, a backlight unit 140, an upper storage container 110, and a lower storage container ( 160).

The liquid crystal panel assembly 130 may include a thin film transistor array panel 133, a liquid crystal panel 136 including a common electrode display panel 134, a liquid crystal (not shown), a gate tape carrier package 131, and a data tape carrier package ( 132, a printed circuit board 135, and the like.

The liquid crystal panel 136 includes a thin film transistor array panel 133 including a gate line (not shown) and a data line (not shown), a thin film transistor array, a pixel electrode, and the like, a black matrix, a common electrode, and the like. And a common electrode display panel 134 disposed to face the thin film transistor array panel 133.

The thin film transistor array panel 133 is a transparent glass substrate on which a thin film transistor on a matrix is formed, and 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) is formed as a conductive material.

When electrical signals are input from the printed circuit board 135 to the data lines and the gate lines of the liquid crystal panel 136 described above, electrical signals are input to the source and gate terminals of the thin film transistor array panel 133. The thin film transistor array panel 133 is turned on or turned off according to an input of a signal, and an electrical signal necessary for pixel formation is output to the drain terminal.

On the other hand, the common electrode display panel 134 is disposed on the thin film transistor array panel 133. The common electrode display panel 134 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 thin film transistor array panel 133 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. Due to the electric field, the arrangement angle of the liquid crystal injected between the thin film transistor array panel 133 and the common electrode display panel 134 is changed, and the light transmittance is changed according to the changed arrangement angle to obtain the original pixel.

The gate tape carrier package 131 is connected to each gate line (not shown) formed on the thin film transistor array panel 133, and the data tape carrier package 132 is each data line (not shown) formed on the thin film transistor array panel 133. Is connected to.

Each of the data PCB and the gate PCB generates a data signal, a gate driving signal, which is a signal for driving the liquid crystal display device 100, and a plurality of timing signals for applying these signals at an appropriate time, thereby providing the gate driving signal to the gate tape carrier. The signal is applied to the gate line of the liquid crystal panel 136 through the package 131, and the data signal is applied to the data line of the liquid crystal panel 136 through the data tape carrier package 132.

The drive circuits 138 on the tape carrier packages 131, 132, and more particularly, the tape carrier packages 131, 132, are generally supported by a flexible film connected to the liquid crystal panel 136. 162). When the intermediate storage container 150 is present, the intermediate storage container 150 may be formed on an area corresponding to the support part 162 of the lower storage container 160 in the intermediate storage container 150. This will be described later.

Meanwhile, in the printed circuit board 135, various gate driving signals and data driving signals for inputting the gate driving signal to the gate tape carrier package 131 and the data driving signal to the data tape carrier package 132 can be processed. The drive component is mounted. The printed circuit board 135 of the liquid crystal panel assembly 130 may be bent along the support part 162 of the lower storage container 160 to be seated on the side of the lower storage container 160. If there is an intermediate container 150, the intermediate container 150 may be seated on the intermediate container 150 in contact with the support 162 of the lower container 160.

In addition, the backlight unit 140 is composed of optical sheets 141, a diffusion plate 142, a lamp assembly 143, and the like.

The lamp assembly 143 includes a lamp that is formed on the reflector plate 144 and emits light and surrounds the lamp. The reflective plate 144 is installed on the lower surface of the lamp assembly 143 to reflect the light emitted to the lower portion of the diffuser plate 142 and the optical sheets 141 to the top. The reflective plate 144 reduces the light loss of the light incident on the liquid crystal panel 136 and improves the uniformity of the light transmitted to the exit surface of the diffuser plate 142.

 In the case of the small liquid crystal display 100, one lamp is usually installed. However, as the size of the liquid crystal display 100 increases, a plurality of lamps may be installed in one lamp assembly 143 to obtain sufficient luminance. In addition, an inverter (not shown) that supplies power to the lamp of the lamp assembly 143 and the lamp assembly 143 are electrically connected by wires.

The diffusion plate 142 and the optical sheets 141 are installed on the upper surface of the lamp assembly 143 to diffuse and collect light transmitted from the lamp assembly 143. The optical sheets 141 include a diffusion sheet, a prism sheet, a protective sheet, and the like. The diffusion sheet located between the diffusion plate 142 and the prism sheet disperses the light incident from the lamp assembly 143 to prevent the light from being partially concentrated. The prism sheet has a triangular prism with a regular arrangement on the upper surface, and is usually composed of two sheets, and each prism array is arranged so as to cross each other at a predetermined angle, so that the light diffused from the diffusion sheet is a liquid crystal panel. Condensing in a direction perpendicular to the (136). As a result, the light passing through the prism sheet almost runs vertically so that the luminance distribution on the protective sheet is uniformly obtained. The protective sheet formed on the prism sheet not only serves to protect the surface of the prism sheet, but also serves to diffuse light in order to make the distribution of light uniform.

In addition, in the above-described embodiment of the present invention, the direct type backlight unit 140 having the structure arranged on the bottom of the plurality of lamps without the light guide plate is described as an example, but the lamp is provided on the side of the light guide plate with the light guide plate. The same applies to the edge type backlight unit provided. In the case of the edge type backlight unit, not only a flat type backlight unit having a lamp assembly at both sides of the light guide plate having a flat plane, but also an edge type backlight having a lamp assembly at one side of the light guide plate The same applies to the unit.

Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2 with respect to the structure of a storage container. The storage container according to an embodiment of the present invention includes an upper storage container 110, an intermediate storage container 150, and a lower storage container 160. The lower storage container 160 is positioned under the backlight unit 140 assembled to the intermediate storage container 150 to cooperate with the upper storage container 110 to protect the liquid crystal panel assembly 130 and the backlight unit 140. It serves as a fixed support. These storage containers may be fastened by a combination of a hook and a hook insertion hole, but may be modified in various forms without being limited thereto.

The lower storage container 160 has a rectangular shape and sidewalls are formed along the edge of the upper surface to accommodate and fix the backlight unit 140 and the liquid crystal panel assembly 130 in the sidewall and include a backlight unit 140. ) To prevent bending. Here, the shape of the lower storage container 160 may be variously modified according to a method of accommodating the backlight unit 140 or the liquid crystal panel assembly 130 in the lower storage container 160. The lower accommodating container 160 generally uses aluminum-based metal to more efficiently discharge heat generated from the lamp assembly 143 to the outside, but is not limited thereto.

At least one sidewall of the plurality of sidewalls of the lower storage container 160 may include a protruding and bent support 162. As will be described later, a plurality of first holes 161 may be formed in the region R corresponding to the data tape carrier package 132 and, more specifically, the region corresponding to the driving circuit 138 in the bent support 162. have. As a result, heat generated in the driving circuit 138 can be discharged to the outside. The plurality of first holes 161 formed in the lower storage container 160 may have a substantially smaller diameter than the plurality of second holes 151 of the intermediate storage container 150, which will be described later. The first holes 161 for dissipating heat may have a small diameter to minimize contact with external contaminants such as dust.

The intermediate storage container 150 may be installed on the lower storage container 160 to protect, fix and support the backlight unit 140. The drive circuit 138 on the data tape carrier package 132, more particularly on the data tape carrier package 132, can typically be disposed on the intermediate storage container 150 by a flexible film connected to the liquid crystal panel 136. have.

That is, the intermediate container 150 may be formed on the support 162 of the lower container, and the driving circuit 138 on the data tape carrier package 132 may be seated thereon. A plurality of first holes 151 may be formed in the region R corresponding to the data tape carrier package 132, and more specifically, in the region corresponding to the driving circuit 138. The size of the first holes 151 may be substantially the same as or larger than that of the driving circuit 138, but is not limited thereto. Heat generated in the driving circuit 138 may be discharged to the outside through the first holes 151.

In the above description, the plurality of holes 151 and 161 formed in the region R corresponding to the data tape carrier package 132 in the lower storage container 160 and the intermediate storage container 150 have been described. Although not limited, a plurality of holes may be formed in predetermined regions of the lower storage container 160 and the intermediate storage container 150 corresponding to the gate tape carrier package 131.

The upper accommodating container 110 is covered by an upper portion of the intermediate storing container 150 to prevent the backlight unit 140 and the liquid crystal panel assembly 130 formed thereon from being separated from the intermediate storing container 150. It is fastened with 150.

Although embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. I can understand that. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive.

As described above, according to the liquid crystal display according to the present invention, the temperature may be lowered because it contacts the outside air and the driving circuit through a plurality of holes of the intermediate container and the lower container.

Claims (4)

A liquid crystal panel assembly comprising a liquid crystal panel and a tape carrier package electrically connected to the liquid crystal panel to transmit a driving signal to the liquid crystal panel; A backlight unit positioned under the liquid crystal panel assembly and supplying light to the liquid crystal panel assembly; A plurality of sidewalls accommodating the liquid crystal panel assembly and the backlight unit therein, and a support part protruding from at least one sidewall of the plurality of sidewalls to support the tape carrier package, the support part supporting the tape carrier package; A lower accommodating container having a plurality of first holes formed in a predetermined region of the support; And And an upper accommodating container corresponding to the lower accommodating container at an upper portion of the liquid crystal panel assembly. According to claim 1, An intermediate storage container disposed between the lower storage container and the upper storage container to accommodate a backlight unit together with the lower storage container;  The intermediate container has a plurality of second holes formed in a predetermined area of the intermediate container corresponding to the tape carrier package. The method of claim 2, The plurality of holes formed in the support of the lower container is smaller than the plurality of holes formed in the intermediate container. According to claim 1, The liquid crystal panel assembly includes a printed circuit board mounted with a driving component, The tape carrier package is a data tape carrier package that provides a data driving signal to the liquid crystal panel. One end of the tape carrier package connected to the liquid crystal panel, and the other end of the tape carrier package to the printed circuit board.

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