KR101721104B1 - Liquid crystal display device - Google Patents

Abstract

The present invention provides a liquid crystal display device including a supporter having an interference avoiding unit which supports a peripheral portion of a driving circuit of a liquid crystal panel on a top surface of a support main body on which the liquid crystal panel having the driving circuit formed on a pad part is mounted. Accordingly, the present invention can reduce a light leakage by preventing interference of an instrument and the deformation of the liquid crystal panel around a chip on glass.

Description

[0001] LIQUID CRYSTAL DISPLAY DEVICE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a display device, and more particularly to a liquid crystal display device capable of improving a light source of a COG (Chip on Glass) structure.

The liquid crystal display device has a large contrast ratio, and is suitable for gradation display and moving image display, and has a low power consumption.

Such a liquid crystal display device is divided into a liquid crystal display module (LCM) and a driving circuit section for driving the liquid crystal display module, and the liquid crystal display module is provided with liquid crystal cells And a backlight unit for applying light to the liquid crystal panel unit.

The liquid crystal panel part and the backlight part must be fastened together in an integrated form and protected by a case so as not to be damaged by an external impact.

The driving circuit unit is mounted on a printed circuit board (PCB) to drive the liquid crystal panel unit. At this time, an FPC (Flexible Printed Circuit) is used for connecting the liquid crystal panel unit and the printed circuit board, and the FPC is directly attached to the substrate of the liquid crystal panel unit and the PCB using a conductive resin or a connector.

The FPC has a structure in which a metallic conductive layer is inserted in a single layer or in multiple layers between flexible layers such as polyamide. Thus, control signals and DC voltages inputted from the outside through the signal lines mounted on the printed circuit board are transmitted to the liquid crystal panel unit.

Hereinafter, a liquid crystal display according to the related art will be described in detail.

1 is a plan view of a conventional liquid crystal display device.

2 is a cross-sectional view of the liquid crystal display device taken along a line II-II in FIG.

3 is a perspective view illustrating a guide panel and a support of a liquid crystal display according to a related art.

4 is an enlarged perspective view of a part of a liquid crystal display according to the related art.

1 and 2, a liquid crystal display according to the related art includes a liquid crystal panel 10 and a backlight unit (not shown) for providing light to the liquid crystal panel 10.

The backlight unit (not shown) includes a light guide plate 50 disposed below the liquid crystal panel 10, a light emitting device 70 disposed on one side of the light guide plate 50, a light guide plate 50, A reflection plate 80 disposed under the light guide plate 50 and a lower cover 40 in which all the components are received and fixed.

A support main body 30 surrounding the lower cover 40 is disposed on the outer side of the lower cover 40 and a liquid crystal panel 10 is mounted on the upper surface of the support main body 30.

The liquid crystal panel 10 includes a color filter substrate 12 having a color filter layer for color implementation, a TFT array substrate 14 which is adhered to the color filter substrate and opposed to the color filter substrate, And a gate driving IC (not shown) and a data driving circuit 92 are provided at the corner of the TFT array substrate 14. The gate driving IC (not shown) And the data driving circuit 92 are connected to a printed circuit board (PCB) 96 via an FPC 94 to provide various control signals and data signals.

Although not shown in the figure, the TFT array substrate 14 on which the thin film transistors are formed includes a data line for transmitting a video signal, a gate line for crossing the data line and defining each pixel and transmitting a scanning signal, A thin film transistor formed at a crossing point of the gate line and the data line, and a pixel electrode formed in each pixel, wherein one end of the gate line and the data line are connected to a gate driving IC (not shown) and a data driving circuit 92, respectively.

The gate driver IC (not shown) is connected to the FPC 94 by a LOG line (not shown), and the data driver circuit 92 is directly connected to the FPC 94, Lt; / RTI >

The printed circuit board 96 is electrically connected to the liquid crystal panel 10 to supply control signals and video signals of the driving integrated circuits. The printed circuit board 96 is mounted on the back side of the lower cover 40 by a double- And is fixed. An FPC 94 is connected between the printed circuit board 96 and the liquid crystal panel 10 so that the FPC 94 is flexibly folded so as to surround the lateral edges of the liquid crystal display module, Is disposed on the back surface of the lower cover 40. [

The FPC 94 located in the pad region of the liquid crystal panel 10, that is, the pad portion 90 of the TFT array substrate 14 provided with the driving IC 92, is freely held or the lower cover 40). At this time, a difference in FPC tension occurs depending on the deviation of the fixed position of the FPC 94 and the temperature / humidity environment. As a result, the position of the pad portion 90 is changed.

1 to 4, on the upper surface of the support main body 30 where the edge portion of the liquid crystal panel 10 is disposed, The support base 32 is disposed to minimize the flow of the liquid crystal panel 10 through a double-sided tape (not shown). At this time, the linear support base 32 is provided on the pad portion 90 including the position where the drive IC 92 of the pad portion 90 overlaps the edge portion of the liquid crystal panel 10. That is, the linear support base 32 is provided on the pad portion of the liquid crystal panel 10, that is, the pad portion of the TFT array substrate 14 in the horizontal direction and the vertical direction.

However, the COG (chip on glass) structure in the prior art is difficult to optimize the process conditions for stable bonding in a high-temperature / high-pressure process. Thus, deformation of the substrate glass may occur physically in the process of attaching the FPC 94 to the liquid crystal panel 10.

Particularly, when the FPC 94 is fixed, a mechanical micro-flow of the pad portion 90 of the liquid crystal panel 10 due to an assembly error occurs.

Therefore, physical stress is generated in the COG region of the pad portion 90 as FPC tension fluctuation occurs in a product environment of a severe temperature / humidity of the vehicle.

5 is a view showing defects of a black uniformity image at the time of assembling the FPC and the driving circuits in the conventional liquid crystal display device.

The black uniformity image shown in FIG. 5 increases the stress at the cemented portion between the liquid crystal panel and the backlight unit, causing mechanical damage, thereby generating light leakage.

The linear support according to the related art does not uniformly support the surface of the liquid crystal panel according to the assembly angle of the liquid crystal panel during the FPC tension operation and the rotation moment of the liquid crystal panel due to the unevenness, , And a tension deviation is generated depending on the length and quantity of the FPC.

Further, in the liquid crystal display according to the related art, COG mura, which is a main failure factor of black uniformity, is a main defect in the IPS mode (In-Plane Switching mode) A mechanical constraint on deformation is generated, which is recognized as a light spot in a black image, and the black uniformity dimension is lowered.

It is an object of the present invention to provide an apparatus and a method for preventing the deformation of a liquid crystal panel around a chip on glass (COG) and interference of a mechanism by applying a support having interference fringes such as a zigzag shape instead of a conventional straight- And to provide a liquid crystal display device capable of improving the leakage.

According to an aspect of the present invention, there is provided a liquid crystal display device including a liquid crystal panel having a driving circuit on a pad portion, a support main body on which the liquid crystal panel is mounted, A liquid crystal display device including a light source array disposed on one side of the light guide plate and a light guide plate disposed under the liquid crystal panel and being wrapped by the support main, .

In the liquid crystal display device according to the present invention, the interference fringe of the support may overlap the peripheral portion of the driving circuit except for the driving circuit.

In the liquid crystal display device according to the present invention, the interference fringe of the support may be a zigzag, a circle, an S, a square or a staircase structure.

In the liquid crystal display device according to the present invention, the driving circuit may overlap the driving circuit overlap portion in the interference fringe.

In the liquid crystal display device according to the present invention, the support base may be integrally provided in the support main.

The liquid crystal display device according to the present invention can be applied to a liquid crystal panel around a COG (chip on glass) by applying a support having an interference avoiding portion such as a zigzag shape around a region overlapping with a driving IC instead of a conventional linear- It is possible to prevent the deformation of the light source and the interference of the structure and improve the light source.

The liquid crystal display device according to the present invention can improve the COG-free light leakage through the interference avoidance structure with the equipment around the COG.

The liquid crystal display device according to the present invention is advantageous in warp rigidity by adopting a support having a zigzag shape, a circle shape, a staircase, an S (S) or a squared interference pattern instead of the conventional linear shape.

 In addition, the liquid crystal display device according to the present invention has a structure in which a support having an interference fringe is applied to secure a structural rigidity against a twist generated by FPC tension, so that a resistance against deformation The dimensional stability is advantageous to the external force from the system environment.

1 is a plan view of a conventional liquid crystal display device.
2 is a cross-sectional view of the liquid crystal display device taken along a line II-II in FIG.
3 is a perspective view illustrating a guide panel and a support of a liquid crystal display according to a related art.
4 is an enlarged perspective view of a part of a liquid crystal display according to the related art.
5 is a view showing defects of a black uniformity image at the time of assembling the FPC and the driving circuits in the conventional liquid crystal display device.
6 is an exploded perspective view of a liquid crystal display device according to an embodiment of the present invention.
7 is a plan view of a liquid crystal display device according to an embodiment of the present invention.
8 is a cross-sectional view of the liquid crystal display device taken along line VIII-VIII of FIG.
9 is an enlarged perspective view of a guide panel and a support according to an embodiment of the present invention.
10 is an enlarged perspective view of a guide panel and a support frame on which a liquid crystal panel is disposed according to an embodiment of the present invention.
11 is a perspective view of a guide panel and a support of a liquid crystal display according to an embodiment of the present invention.
12 is an enlarged perspective view of a guide panel and a support of a liquid crystal display according to an embodiment of the present invention.
13 is a view for explaining non-uniformity of tension of driving circuits due to panel assembly deviation in a liquid crystal display device according to an embodiment of the present invention.
14 is a graph showing changes in black uniformity of liquid crystal module (LCM) samples in a liquid crystal display device according to an embodiment of the present invention.
15 is a view showing black uniformity images at the time of assembling the FPC and the driving circuits in the liquid crystal display device according to the embodiment of the present invention.
16 is a plan view of a liquid crystal display device according to another embodiment of the present invention.
17 is an assembled cross-sectional view of the liquid crystal display device taken along the line VIII-VIII in FIG.
18 is an enlarged perspective view of a guide panel and a support according to another embodiment of the present invention.
FIG. 19 is an enlarged perspective view of a guide panel and a support frame in which a liquid crystal panel is disposed according to another embodiment of the present invention. FIG.

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

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

7 is a plan view of a liquid crystal display device according to an embodiment of the present invention.

8 is a cross-sectional view of the liquid crystal display device taken along line VIII-VIII of FIG.

9 is an enlarged perspective view of a guide panel and a support according to an embodiment of the present invention.

10 is an enlarged perspective view of a guide panel and a support frame on which a liquid crystal panel is disposed according to an embodiment of the present invention.

11 is a perspective view of a guide panel and a support of a liquid crystal display according to an embodiment of the present invention.

12 is an enlarged perspective view of a guide panel and a support of a liquid crystal display according to an embodiment of the present invention.

6, a liquid crystal display device includes a liquid crystal panel 110 and a backlight unit 120. The liquid crystal panel 110 and the backlight unit 120 are modularized And a support main body 130 for supporting the user.

Here, the liquid crystal panel 110 is a part that plays a key role in image display and includes a first substrate 112 and a second substrate 114 which are bonded to each other with a liquid crystal layer (not shown) interposed therebetween do.

Although not shown in the drawings, the inner surface of the first substrate 112, which is usually called an upper substrate or a color filter substrate, includes red (R), green (G), blue (B) And a black matrix covering the gate lines, the data lines, and the thin film transistors. Further, a color filter of red (R), green (G), and blue (B) colors and a transparent common electrode covering the black matrix are provided.

A plurality of gate lines and data lines cross each other on the inner surface of a first substrate 114 called a lower substrate or an array substrate, pixels are defined, and a thin film transistor (TFT) And are connected in a one-to-one correspondence with the transparent pixel electrodes formed in the respective pixels.

A polarizer (not shown) selectively transmitting only specific light is attached to the outer surfaces of the first and second substrates 112 and 114, respectively.

At this time, the second substrate 114 is further provided with a pad region, that is, a pad portion 190, so that the area of one edge is larger than that of the first substrate 112.

Accordingly, the pad unit 190, which is one edge of the second substrate 114, constitutes a driving circuit 192 for applying signals to a plurality of gate lines and data lines.

This structure is referred to as a COG (chip on glass) type liquid crystal panel 110. In the COG method, an anisotropic conductive film (not shown) is used to directly drive the driving circuit 192 on the second substrate 114 It is advantageous in that the ratio of the liquid crystal panel 110 occupied by the liquid crystal display device can be increased.

The driving circuit 192 is connected to a plurality of gates and a data driving circuit, and each of the gates and the data driving circuit 192 is connected to a gate and a data line (not shown) on the second substrate 114, respectively.

The gate and data driving circuit 192 are connected to an FPC 194 which outputs various signal voltages.

A plurality of wiring patterns (not shown) connected to the data and gate driving circuit 192 are aligned to one side edge of the FPC 194 and bonded to the liquid crystal panel 110 via an anisotropic conductive film (not shown) .

The FPC 194 of the present invention includes a printed circuit board (PCB) 196 separately provided on the back surface of the liquid crystal display device through a connector (not shown) provided on the back surface of the backlight unit 120 in the modularization process of the liquid crystal display device, Lt; / RTI >

In particular, the printed circuit board 196 is electrically connected to the liquid crystal panel 110 to supply control signals and video signals of the driving circuits. The printed circuit board 196 is fixed to the back surface 140 of the lower cover 140 by a double- Respectively. An FPC 194 is connected between the printed circuit board 196 and the liquid crystal panel 110. The FPC 194 is folded so as to surround the lateral edges of the liquid crystal display module so that the printed circuit board 196 Is disposed on the back surface of the lower cover 140. [

When the thin film transistor selected for each gate line is turned on by the on / off signal of the gate driving circuit, the liquid crystal panel 110 transmits the signal voltage of the data driving circuit to the corresponding pixel electrode through the data line, The arrangement direction of the liquid crystal molecules is changed by the electric field between the pixel electrode and the common electrode to show a difference in transmittance.

In the liquid crystal display device according to the present invention, a backlight unit 120 for supplying light to the backside of the liquid crystal panel 110 is provided so that the difference in transmittance of the liquid crystal panel 110 is manifested to the outside.

The backlight unit 120 is disposed below the liquid crystal panel 110 and provides light to the liquid crystal panel 110.

The backlight unit 120 includes a lower cover 140, a light source array 170 disposed on one side of the lower cover 140, a light guide plate 150 disposed adjacent to the light source array 170, An optical sheet 160 disposed on the upper side of the light guide plate 150 and a reflective sheet 180 disposed on the lower side of the light guide plate 150.

The light source array 170 serves to generate light and includes a plurality of light emitting devices 172 and an array substrate 174 on which the light emitting devices 172 are mounted. Here, the light emitting device 172 may be an R, G, B light emitting diode that emits red light, G (green), or B (blue) monochromatic light, or a light emitting diode that emits white light, (Side View) type device can be used.

When a light emitting device that emits monochromatic light is used, monochromatic light emitting devices of R, G, and B are alternately arranged at regular intervals, monochromatic light emitted therefrom is mixed with white light, and then supplied to the liquid crystal panel 110 . Alternatively, when a light emitting device that emits white light is used, a plurality of light emitting devices may be arranged at a predetermined interval to supply white light to the liquid crystal panel 110. [

For example, a white light emitting device is composed of a blue light emitting device that emits blue light and a phosphor that emits yellow light by absorbing blue monochromatic light. The blue monochromatic light output from the blue light emitting device and the yellow monochromatic light emitted by the phosphor Light can be mixed and supplied to the liquid crystal panel 110 as white light.

The array substrate 174 is a flexible circuit board having excellent warpage, and a circuit (not shown) may be formed therein. Thus, external power can be supplied to the light emitting element through the circuit.

Although the light source array is disposed on one side of the light guide plate 150 as a side backlight unit in the drawing, the light source array may be disposed on the other side of the light guide plate 150, Can be applied.

Although a light emitting element is used as a light source, the present invention is not limited thereto, and various light sources that generate light such as a cold cathode fluorescent lamp can be used.

The light guide plate (LGP) 150 guides the light emitted from the light emitting devices 170 to the liquid crystal panel 110. Light incident on one side of the light guide plate 150 is refracted and reflected repeatedly by a diffusing agent added to the inside of the light guide plate 150 to advance to the other side and then emitted to the upper side of the light guide plate 150. That is, the light guide plate 150 changes the light having the optical distribution in the form of a point light source or a linear light source to light having an optical distribution in the form of a surface light source.

The reflective sheet 180 is disposed under the light guide plate 150 and reflects light emitted from the light guide plate 150 downward in the direction of the liquid crystal panel 110. The reflection sheet 180 can adjust the reflection amount of the entire incident light so that the entire light output surface has a uniform luminance distribution.

6 and 8, the optical sheets 160 include a diffusion sheet 162 for diffusing the light emitted from the light guide plate 150, and a condenser lens 162 for condensing the light diffused by the diffusion sheet 162, And a plurality of prism sheets 164 and a light condensing sheet 166 for supplying uniform light to the entire area of the panel 110.

The diffusion sheet 162 is normally provided with one sheet, but the prism sheet 164 may include a first prism sheet and a second prism sheet that are perpendicular to each other in the X and Y axis directions. The first prism sheet and the second prism sheet can refract light in the X and Y axis directions to improve the straightness of light.

A pattern (not shown) may be formed on one surface of the prism sheet 164 to distribute the brightness of the light evenly. The shape of the pattern may be various shapes such as an acid, a hemisphere, and a polygon.

The light condensing sheet 166 condenses light diffused through the diffusion sheet 162 in the direction of the liquid crystal panel 110. Therefore, almost the light passing through the light condensing sheet 166 proceeds almost perpendicularly to the liquid crystal panel 110.

A support main body 130 is disposed on the outer side of the lower cover 140 so as to surround the lower cover and an edge of the liquid crystal panel 110 is seated on the upper surface of the support main body 130.

6, 7, 8, and 10, a supporter 132 including a horizontal portion 132a and a vertical portion 132b is formed on the upper surface of the support main body 130, And is integrally formed. An interference fringe skin 132c is provided at a predetermined interval in the horizontal portion 132a and a driving circuit overlap portion 132d overlapping the driving circuit 192 is provided in the interference fringe skin 132c have.

The support base 132 is used to prevent the liquid crystal panel 110 from sagging when the FPC 194 is folded. The interference fringe skin 132c constituting the support base 132 is used to prevent local deformation around the drive circuit 192 and interference with the mechanism. Particularly, the interference fringe skin 132c overlaps the peripheral portion of the driving circuit 192 provided on the pad portion 190 of the liquid crystal panel 110, which is seated on the upper surface of the support main body 130. [ That is, the driving circuit 192 does not overlap with the interference skin 132c of the lower support main body 130, but overlaps the driving circuit overlap portion 132d in the interference skin 132c. (130).

13 is a view for explaining non-uniformity of tension of driving circuits due to panel assembly deviation in a liquid crystal display device according to an embodiment of the present invention.

Referring to FIG. 13, it can be said that the source drive circuit quantity is related to the FPC and COG quantity and the FPC tension (F) position.

The position L of the fulcrum at the time of applying the support base 132 having the interference fringe skin 132c in the zigzag shape applied to the liquid crystal display device according to the present invention, that is, the distance L between the interference fringe skin 132c and the drive circuit 192 The deflection of the liquid crystal panel 110 due to the tension F can be reduced. Particularly, uneven characteristics are generated between the tension F1, F2, F3, and F4 of the driving circuits 192 due to an assembly deviation (i.e., twist angle phi xy) of the liquid crystal panel 110, The twist of the liquid crystal panel 110 surface can be reduced.

Therefore, the support structure having the interference fringe skin of the present invention is advantageous in the torsional rigidity due to the position (L) of the support point being near and farther than that of the conventional linear support structure.

In addition, the present invention can improve the flatness level of the liquid crystal panel by securing the twisted rigidity by increasing the low section modulus by applying a support having a staggered interference fringe.

Further, the present invention increases the rigidity by applying a support having a zigzag-shaped interference fringe skin to increase the resistance against deformation, and therefore, dimensional stability is advantageous to external forces from the system environment.

14 is a graph showing changes in black uniformity of liquid crystal module (LCM) samples in a liquid crystal display device according to an embodiment of the present invention.

14 is a graph showing the black uniformity of a plurality of liquid crystal module (LCM) samples. As shown in the figure, the ratio of the black uniformity of the liquid crystal module (LCM) to the structure around the driving circuit 192 in the pad portion 190 of the liquid crystal panel 110 It can be seen that the black uniformity is increased by about 19% or more through the interference fringe skin 132c, that is, the support member 132 having the zigzag structure, and the COG Mura light beam is improved compared with the conventional one .

15 is a view showing black uniformity images at the time of assembling the FPC and the driving circuits in the liquid crystal display device according to the embodiment of the present invention.

With the black uniformity image shown in FIG. 15, it can be seen that the COG mura is improved compared to the conventional, that is, the black uniformity image shown in FIG.

Hereinafter, a liquid crystal display device according to another embodiment of the present invention will be described with reference to the accompanying drawings.

16 is a plan view of a liquid crystal display device according to another embodiment of the present invention.

17 is an assembled cross-sectional view of the liquid crystal display device taken along the line VIII-VIII in FIG.

18 is an enlarged perspective view of a guide panel and a support according to another embodiment of the present invention.

FIG. 19 is an enlarged perspective view of a guide panel and a support frame in which a liquid crystal panel is disposed according to another embodiment of the present invention. FIG.

16 to 19, a liquid crystal display device includes a liquid crystal panel 210 and a backlight unit 220, and includes a liquid crystal panel 210 and a backlight unit 220. [ And a support main body 230 for modularizing the main body 220.

Here, the liquid crystal panel 210 includes a first substrate 212 and a second substrate 214 which are bonded to each other with a liquid crystal layer (not shown) interposed therebetween, do.

Although not shown in the drawings, the inner surface of the first substrate 212, which is usually called an upper substrate or a color filter substrate, includes red (R), green (G), and blue (B) And a black matrix covering the gate lines, the data lines, and the thin film transistors. Further, a color filter of red (R), green (G), and blue (B) colors and a transparent common electrode covering the black matrix are provided.

A plurality of gate lines and data lines cross each other on the inner surface of a first substrate 214 called a lower substrate or an array substrate, pixels are defined, and a thin film transistor (TFT) is formed at each intersection And are connected in a one-to-one correspondence with the transparent pixel electrodes formed in the respective pixels.

A polarizer (not shown) for selectively transmitting only specific light is attached to the outer surfaces of the first and second substrates 212 and 214, respectively.

At this time, the second substrate 214 is further provided with a pad region, that is, a pad portion 290, as compared with the first substrate 212, so that the area of one edge is larger.

Therefore, the pad portion 290, which is one edge of the second substrate 214, constitutes a driving circuit 292 for applying signals to a plurality of gate lines and data lines.

This structure is referred to as a COG (chip on glass) type liquid crystal panel 210. In the COG method, an anisotropic conductive film (not shown) is used to directly drive the drive circuit 292 on the second substrate 214 It is advantageous in that the proportion of the liquid crystal panel 210 occupied by the liquid crystal display device can be increased.

The driving circuit 292 is a plurality of gates and data driving circuits, and each gate and data driving circuit 292 is connected to a gate and a data line (not shown) on the second substrate 214, respectively.

The gate and data driving circuit 292 are connected to an FPC 294 which outputs various signal voltages.

A plurality of wiring patterns (not shown) connected to the data and gate driving circuit 292 are aligned at one edge of the FPC 294 and bonded to the liquid crystal panel 210 via an anisotropic conductive film (not shown) .

The FPC 294 of the present invention includes a printed circuit board (PCB) 296 separately provided on the back surface of the liquid crystal display device through a connector (not shown) provided on the back surface of the backlight unit 220 in the modularization process of the liquid crystal display device, Lt; / RTI >

In particular, the printed circuit board 296 is electrically connected to the liquid crystal panel 210 to supply control signals and video signals of the driving circuits. The printed circuit board 296 is fixed to the back surface 240 of the lower cover 240 by a double- Respectively. An FPC 294 is connected between the printed circuit board 296 and the liquid crystal panel 210. The FPC 294 is folded and folded so as to surround the lateral edges of the liquid crystal display module so that the printed circuit board 296 Is disposed on the back surface of the lower cover 240. [

In this liquid crystal panel 210, when a selected thin film transistor is turned on for each gate line by an on / off signal of the gate driving circuit, the signal voltage of the data driving circuit is transmitted to the corresponding pixel electrode through the data line, The arrangement direction of the liquid crystal molecules is changed by the electric field between the pixel electrode and the common electrode to show a difference in transmittance.

In the liquid crystal display device according to the present invention, a backlight unit 220 for supplying light to the back surface of the liquid crystal panel 210 is provided so that the difference in transmittance of the liquid crystal panel 210 is expressed externally.

The backlight unit 220 is disposed below the liquid crystal panel 210 and provides light to the liquid crystal panel 210.

The backlight unit 220 includes a lower cover 240, a light emitting array 270 disposed on one side of the lower cover 240, a light guide plate 250 disposed adjacent to the light emitting array 270, An optical sheet 260 disposed on the upper side of the light guide plate 250 and a reflective sheet 280 disposed on the lower side of the light guide plate 250.

The light emitting array 270 serves to generate light and includes a plurality of light emitting devices 272 and an array substrate 274 on which the light emitting devices 272 are mounted. The light emitting device 272 may be an R, G, or B light emitting diode that emits red light, G (green), or B (blue) monochromatic light, or a light emitting diode that emits white light. (Side View) type device can be used.

When a light emitting device that emits monochromatic light is used, monochromatic light emitting devices of R, G, and B are alternately arranged at regular intervals, monochromatic light emitted therefrom is mixed with white light, and then supplied to the liquid crystal panel 210 . Alternatively, when a light emitting element that emits white light is used, a plurality of light emitting elements may be arranged at a predetermined interval to supply white light to the liquid crystal panel 210. [

For example, a white light emitting device is composed of a blue light emitting device that emits blue light and a phosphor that emits yellow light by absorbing blue monochromatic light. The blue monochromatic light output from the blue light emitting device and the yellow monochromatic light emitted by the phosphor Light can be mixed and supplied to the liquid crystal panel 110 as white light.

The array substrate 274 is a flexible circuit board having excellent warpage, and a circuit (not shown) may be formed therein. Thus, external power can be supplied to the light emitting element through the circuit.

Although the light source array 270 is disposed on one side of the light guide plate 250 as a side backlight unit in the drawing, the light source array 270 may be disposed on the other side of the light guide plate 250, It can also be applied to a backlight unit.

Although a light emitting element is used as a light source, the present invention is not limited thereto, and various light sources that generate light such as a cold cathode fluorescent lamp can be used.

The light guide plate (LGP) 250 guides the light emitted from the light emitting array 270 to the liquid crystal panel 210. The light incident on one side of the light guide plate 250 is refracted and reflected by the diffuser added to the inside of the light guide plate 250 to advance to the other side and then emitted to the upper side of the light guide plate 250. That is, the light guide plate 250 serves to change the light having the optical distribution in the form of a point light source or a linear light source into light having an optical distribution in the form of a surface light source.

The reflective sheet 280 is disposed under the light guide plate 250 and reflects light emitted from the light guide plate 250 to the lower side in the direction of the liquid crystal panel 210. The reflection sheet 280 can adjust the reflection amount of the entire incident light so that the entire light outputting surface has a uniform luminance distribution.

17, the optical sheets 260 include a diffusion sheet 262 for diffusing the light emitted from the light guide plate 250 and a liquid crystal panel (not shown) for condensing the light diffused by the diffusion sheet 262 And a plurality of prism sheets 264 and a light condensing sheet 266 that supply uniform light to the entire area of the light guide plate 210.

The diffusion sheet 262 is usually provided on one sheet, but the prism sheet 264 may include a first prism sheet and a second prism sheet that are perpendicular to each other in the X and Y axis directions. The first prism sheet and the second prism sheet can refract light in the X and Y axis directions to improve the straightness of light.

A pattern (not shown) may be formed on one surface of the prism sheet 264 to distribute the brightness of the light evenly. The shape of the pattern may be various shapes such as an acid, a hemisphere, and a polygon.

The light condensing sheet 266 condenses light diffused through the diffusion sheet 262 toward the liquid crystal panel 210. Accordingly, the light passing through the light collecting sheet 266 travels almost perpendicularly to the liquid crystal panel 210.

A support main body 230 is disposed on the outer side of the lower cover 240 to surround the lower cover and an edge of the liquid crystal panel 210 is disposed on the upper surface of the support main body 230.

16 to 19, a support base 232 including a horizontal portion 232a and a vertical portion 232b is formed integrally with the support main body 230 on the upper surface of the support main body 130, have. An interference fringe skin 232c is provided on the horizontal part 232a at regular intervals and a driving circuit overlap part 232d overlapping the driving circuit 292 is provided in the interference fringe skin 232c have.

The support base 232 is used to prevent the liquid crystal panel 210 from sagging when the FPC 294 is folded. The interference fringe skin 232c constituting the support base 232 is used to prevent local deformation around the drive circuit 292 and interference with the mechanism. Particularly, the interference skin 232c has a structure in which it overlaps with a peripheral portion of the driving circuit 292 provided in the pad portion 290 of the liquid crystal panel 210, which is seated on the upper surface of the support main body 230. 16, 17, and 19, the driving circuit 292 does not overlap with the interference skin 232c of the lower support main body 230, and the inner skin of the interference skin 232c And is disposed on the support base 232 of the support main body 230 so as to overlap the drive circuit superposing portion 232d.

The interference fringe skin 232c is not limited to a circular shape, but may be a zigzag shape, a stair shape, an S shape, a square shape, or the like as in an embodiment of the present invention. Various embodiments are possible. In particular, the interference fringe skin 232c can be applied to any structure as long as it does not overlap with the driving circuit 292 of the pad unit 290 of the liquid crystal panel 210.

As described above, in the liquid crystal display device according to the present invention, instead of a conventional linear support, a support having an interference avoiding portion such as a zigzag shape is applied around a region overlapping the drive IC, It is possible to prevent the deformation of the liquid crystal panel and the interference of the equipment and improve the light spot.

The liquid crystal display device according to the present invention can improve the COG-free light leakage through the interference avoidance structure with the equipment around the COG.

The liquid crystal display device according to the present invention is advantageous in warp rigidity by adopting a support having a zigzag shape, a circle shape, a staircase, an S (S) or a squared interference pattern instead of the conventional linear shape.

 In addition, the liquid crystal display device according to the present invention has a structure in which a support having an interference fringe is applied to secure a structural rigidity against a twist generated by FPC tension, so that a resistance against deformation The dimensional stability is advantageous to the external force from the system environment.

Although the embodiments have been described with reference to the drawings, the present invention is not limited thereto.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

110: liquid crystal panel 120: backlight unit
130: support main 132a: horizontal part
132b: Vertical part 132c: Interference skin
132d: drive circuit superposing portion 190: pad portion
192: drive circuit 194: FPC
196: PCB

Claims (5)

A liquid crystal panel having a driving circuit in a pad portion;
A support main body on which the liquid crystal panel is placed;
A supporting base having a horizontal portion and a vertical portion and provided on an upper surface of the support main body and supporting the pad portion of the liquid crystal panel corresponding to a peripheral portion of the driving circuit of the liquid crystal panel;
A light guide plate positioned below the liquid crystal panel and being wrapped by the support main; And
And a light source array disposed on one side of the light guide plate,
Wherein the interference fringes provided on the support are provided at predetermined intervals in the horizontal portion,
And a driving circuit superimposition unit overlapping the driving circuit in the interference fringe. The liquid crystal display of claim 1, wherein the interference fringes of the support are overlapped with the pad portions of the liquid crystal panel corresponding to the peripheral portion of the driving circuit except for the driving circuit. The liquid crystal display of claim 1, wherein the interference fringes of the support are zigzag, circle, S, square, or stepped. delete The liquid crystal display device according to claim 1, wherein the support base having the interference fringe is integrally formed with the support main.

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