KR20100018432A - Liquid crystal display device - Google Patents

Abstract

PURPOSE: A liquid crystal display device with a connecting unit is provided to insert a connecting unit between a light emitting unit substrate and a main substrate, thereby connecting the light emitting unit substrate and the main substrate. CONSTITUTION: A light guide plate is arranged under an LCD(Liquid Crystal Display) panel. A light source is arranged in one side of the light guide plate. The light source generates light. A light emitting unit substrate(500) is connected to the light source. A main substrate(600) is connected to the liquid crystal panel. The main substrate is arranged under the light emitting unit substrate. A connecting unit(700) is inserted between the light emitting unit substrate and the main substrate. The connecting unit electrically connects the light emitting unit substrate and the main substrate.

Description

[0001] LIQUID CRYSTAL DISPLAY DEVICE [0002]

An embodiment relates to a liquid crystal display device.

As information processing technology develops, display devices such as LCD, PDP and AMOLED are being used. In particular, the LCD includes an LED for generating light and an LED FPCB for applying a driving signal to the light source.

At this time, there is a need for a method for efficiently connecting the LED FPCB and the main FPCB.

The embodiment provides a liquid crystal display device in which a light emitting unit substrate and a main substrate are efficiently connected. In particular, the embodiment provides a liquid crystal display device in which a solder paste is not used and a light emitting unit substrate and a main substrate are connected.

In another embodiment, a liquid crystal display device includes: a liquid crystal panel; A light guide plate disposed under the liquid crystal panel; A light source disposed on one side of the light guide plate to generate light; A light emitting unit substrate connected to the light source; A main substrate connected to the liquid crystal panel and disposed under the light emitting unit substrate; And a connection part interposed between the light emitting part substrate and the main substrate to electrically connect the light emitting part substrate and the main substrate.

In the liquid crystal display according to the embodiment, the light emitting unit substrate and the main substrate are connected by a connection part interposed between the light emitting unit substrate and the main substrate.

In particular, when the connection portion has elasticity and pressure is applied to the light emitting portion substrate and the main substrate, the light emitting portion substrate and the main substrate are efficiently connected.

Accordingly, the liquid crystal display according to the embodiment may connect the light emitting unit substrate and the main substrate without going through a solder process of attaching solder paste to the light emitter substrate and the main substrate.

In addition, the method of connecting the light emitting unit substrate and the main substrate of the embodiment may be effectively applied to an integrated liquid crystal display device in which a protective window and a liquid crystal display module are integrated.

In the description of the embodiments, each panel, sheet, frame, plate, part, or substrate is formed on or under the "pan" of each panel, sheet, frame, plate, part, or substrate, and the like. When described as being "in" and "under" includes both those that are formed "directly" or "indirectly" through other components. In addition, the criteria for the top or bottom of each component will be described with reference to the drawings. The size of each component in the drawings may be exaggerated for description, and does not mean a size that is actually applied.

1 is an exploded perspective view illustrating a liquid crystal display according to an embodiment. 2 is a cross-sectional view illustrating a cross section of the liquid crystal display according to the embodiment. 3 is a cross-sectional view illustrating a light emitting unit substrate, a main substrate, and a connecting unit.

1 to 3, the liquid crystal display according to the embodiment includes a mold frame 110, a chassis 120, a backlight assembly 200, a main liquid crystal panel 300, a sub liquid crystal panel 400, and a light emitting unit. The substrate 500 includes a main substrate 600, a connection part 700, a first protective window 810, and a second protective window 820.

The mold frame 110 has a rectangular frame shape. The mold frame 110 accommodates the backlight assembly 200 and the main liquid crystal panel 300. Examples of the material used for the mold frame 110 may include plastic or reinforced plastic.

The chassis 120 is disposed outside the mold frame 110. The chassis 120 reinforces the strength of the mold frame 110. Examples of the material used for the chassis 120 include metals and the like.

The chassis 120 includes a first support part 121 disposed on the side of the mold frame 110 and a second support part 122 disposed below the mold frame 110. In addition, the second support part 122 includes a first hole 123 corresponding to the light emitting part substrate 500 and a second hole 124 corresponding to the sub liquid crystal panel 400.

The backlight assembly 200 is disposed inside the mold frame 110. The backlight assembly 200 generates light and emits the light upward and downward. The backlight assembly 200 includes a light guide plate 210, a light emitting diode 220, a first optical sheet 231, and a second optical sheet 232.

The light guide plate 210 receives light emitted from the light emitting diodes 220 and emits upward and downward by reflection, scattering, and refraction.

The light emitting diodes 220 are disposed on side surfaces of the light guide plate 210. The light emitting diode 220 generates light and emits the light toward the light guide plate 210. The light emitting diodes 220 are mounted on the light emitting unit substrate 500. The light emitting diode 220 is connected to the light emitting unit substrate 500 and receives a driving signal through the light emitting unit substrate 500.

The first optical sheet 231 is disposed on the light guide plate 210, and the second optical sheet 232 is disposed below the light guide plate 210. The first optical sheet 231 and the second optical sheet 232 improve the characteristics of the light passing through.

The main liquid crystal panel 300 is disposed on the first optical sheet 231. The main liquid crystal panel 300 is disposed inside the mold frame 110.

The sub liquid crystal panel 400 is disposed under the second optical sheet 232. The sub liquid crystal panel 400 is disposed corresponding to the second hole 124.

The main liquid crystal panel 300 and the sub liquid crystal panel 400 display an image by adjusting the intensity of light passing through each pixel. The main liquid crystal panel 300 and the sub liquid crystal panel 400 are connected to the main substrate 600.

The main liquid crystal panel 300 and the sub liquid crystal panel 400 are disposed on a liquid crystal layer interposed between a TFT substrate, a color filter substrate, the TFT substrate, and the color filter substrate, under the TFT substrate, and on the color filter substrate. And a polarizing filter.

The light emitting unit substrate 500 mounts the light emitting diodes 220. The light emitting unit substrate 500 is disposed under the mold frame 110 and is disposed inside the first hole 123. The light emitting unit substrate 500 is a printed circuit board (PCB) or a flexible printed circuit board (FPCB).

The light emitting unit substrate 500 is electrically connected to the light emitting diode 220, and a driving signal is applied to the light emitting diode 220 through the light emitting unit substrate 500. The light emitting unit substrate 500 includes a first wiring layer 510, a first passivation layer 520, and a first connection pad 530.

The first wiring layer 510 is a conductive layer and includes a wiring pattern and a circuit pattern. The first wiring layer 510 is electrically connected to the light emitting diodes 220. Examples of the material used for the first wiring layer 510 include copper and the like.

The first passivation layer 520 surrounds the first wiring layer 510. The first passivation layer 520 is an insulating layer and protects the first wiring layer 510.

The first connection pad 530 is a metal pad exposed by removing a portion of the first passivation layer 520. The first connection pad 530 is formed in the first wiring layer 510.

The main substrate 600 is connected to the main liquid crystal panel 300 and the sub liquid crystal panel 400. Drive elements for driving the main liquid crystal panel 300 and the sub liquid crystal panel 400 are mounted on the main substrate 600.

The main substrate 600 includes a second wiring layer 610, a second passivation layer 620, and a second connection pad 630.

The second wiring layer 610 is a conductive layer and includes a wiring pattern and a circuit pattern. The second wiring layer 610 is electrically connected to the main liquid crystal panel 300 and the sub liquid crystal panel 400. Examples of the material used for the second wiring layer 610 include copper and the like.

The second passivation layer 620 surrounds the second wiring layer 610. The second passivation layer 620 protects the second wiring layer 610.

The second connection pad 630 is a metal pad exposed by removing a portion of the second passivation layer 620. The second connection pad 630 is formed in the second wiring layer 610. In addition, the second connection pad 630 is formed corresponding to the first connection pad 530.

The connection part 700 is disposed between the main substrate 600 and the light emitting part substrate 500. In more detail, the connection part 700 is disposed between the first connection pad 530 and the second connection pad 630.

The connection part 700 is a conductor. In more detail, the connection part 700 includes a metal and is elastic. The connection part 700 has a dome shape. For example, the connection part 700 is a hollow metal member. In addition, the connection part 700 may have a convex protrusion shape.

The connection part 700 is bonded to the second connection pad 630. In more detail, the connection part 700 is bonded to the main substrate 600 and protrudes toward the light emitting part substrate 500.

In addition, the connection part 700 contacts the first connection pad 530. That is, the connection part 700 is elastic, and when pressure is applied to the light emitting part substrate 500 and the main substrate 600, the connection part 700 contacts the first connection pad 530. The first connection pad 530 and the second connection pad 630 are connected to each other.

Therefore, the connection part 700 connects the light emitting part substrate 500 and the main substrate 600.

The first protective window 810 is in close contact with the main liquid crystal panel 300. In this case, a transparent resin 811 is filled between the first protective window 810 and the main liquid crystal panel 300. By the transparent resin, no air layer exists between the first protective window 810 and the main liquid crystal panel 300.

In addition, the transparent resin adheres the first protective window 810 to the chassis 120 and the mold frame 110.

The second protective window 820 is in close contact with the sub liquid crystal panel 400. In this case, the transparent resin 811 is filled between the second protective window 820 and the sub liquid crystal panel 400. In addition, the second protective window 820 is bonded to the chassis 120 and the main substrate 600.

Accordingly, the liquid crystal display according to the exemplary embodiment is integrally formed, and since the second protective window 820 is adhered to the chassis 120 and the main substrate 600, the pressure is applied to the main substrate 600. Add.

Therefore, the connection part 700 is more firmly in contact with the first connection pad 530, and the main substrate 600 and the light emitting part substrate 500 are efficiently connected.

In the liquid crystal display according to the exemplary embodiment, the light emitting unit substrate 500 and the main substrate 600 are connected by the connection unit 700.

Accordingly, the liquid crystal display according to the embodiment may connect the light emitting unit substrate 500 and the main substrate 600 without going through a solder process for attaching solder paste to the light emitter substrate and the main substrate 600. have.

In addition, in the process of manufacturing the integrated liquid crystal display, it is difficult to proceed with the solder process for connecting the light emitting unit substrate 500 and the main substrate 600. Accordingly, the embodiment provides a liquid crystal display device in which the light emitting unit substrate 500 and the main substrate 600 are efficiently connected in the case of an integrated liquid crystal display device.

4 is a cross-sectional view illustrating a light emitting part substrate, a main substrate, and a connection part according to another exemplary embodiment. In this embodiment, with reference to the above-described embodiment, the connection unit will be further described.

Referring to FIG. 4, the connection part 710 is bonded to the first connection pad 530. The connection part 710 is attached to the light emitting part substrate 500 and protrudes toward the main substrate 600. The connection part 710 contacts the second connection pad 630.

The light emitting unit substrate 500 and the main substrate 600 are connected by the connection unit 710.

The liquid crystal display according to the present embodiment may have an effect similar to that of the above-described embodiment.

5 is a cross-sectional view illustrating a light emitting part substrate, a main substrate, and a connection part according to another exemplary embodiment. In this embodiment, with reference to the above-described embodiment, the connection unit will be further described.

Referring to FIG. 5, the connection part 720 includes a first connection part 721 and a second connection part 722.

The first connector 721 is bonded to the first connector pad 530. The first connection part 721 is attached to the light emitting part substrate 500 and protrudes toward the main substrate 600.

The second connector 722 is bonded to the second connection pad 630. The second connector 722 corresponds to the first connector 721. The second connector 722 is attached to the main substrate 600 and protrudes toward the light emitting unit substrate 500.

The first connector 721 and the second connector 722 contact each other and connect the main substrate 600 and the light emitting substrate 500.

The liquid crystal display according to the present exemplary embodiment efficiently connects the main substrate 600 and the light emitting substrate 500 by two connection parts 700.

Therefore, the liquid crystal display according to the present exemplary embodiment can effectively prevent the short circuit between the main substrate 600 and the light emitting unit substrate 500.

Although the above description has been made based on the embodiments, these are merely examples and are not intended to limit the present invention. Those skilled in the art to which the present invention pertains may not have been exemplified above without departing from the essential characteristics of the present embodiments. It will be appreciated that many variations and applications are possible. For example, each component specifically shown in the embodiment can be modified. And differences relating to such modifications and applications will have to be construed as being included in the scope of the invention defined in the appended claims.

1 is an exploded perspective view illustrating a liquid crystal display according to an embodiment.

2 is a cross-sectional view illustrating a cross section of the liquid crystal display according to the embodiment.

3 is a cross-sectional view illustrating a light emitting unit substrate, a main substrate, and a connecting unit.

4 is a cross-sectional view illustrating a light emitting part substrate, a main substrate, and a connection part according to another exemplary embodiment.

5 is a cross-sectional view illustrating a light emitting part substrate, a main substrate, and a connection part according to another exemplary embodiment.

Claims (11)

A liquid crystal panel; A light guide plate disposed under the liquid crystal panel; A light source disposed on one side of the light guide plate to generate light; A light emitting unit substrate connected to the light source; A main substrate connected to the liquid crystal panel and disposed under the light emitting unit substrate; And And a connection part interposed between the light emitting part substrate and the main substrate to electrically connect the light emitting part substrate and the main substrate. The liquid crystal display device of claim 1, wherein the connection part is bonded to the light emitting part substrate to protrude toward the main substrate. The liquid crystal display device of claim 2, wherein the main substrate comprises a connection pad corresponding to the connection portion. The liquid crystal display device according to claim 1, wherein the connection portion is bonded to the main substrate and protrudes toward the light emitting portion substrate. The liquid crystal display of claim 4, wherein the light emitting unit substrate comprises a connection pad corresponding to the connection unit. The liquid crystal display device according to claim 1, wherein the connection portion is a metal member having an empty inside. The liquid crystal display of claim 1, wherein the connection portion is a conductor having a dome shape. The liquid crystal display device according to claim 1, wherein the connection portion is an elastic conductor. The method of claim 1, A first protective window in close contact with the liquid crystal panel; A sub liquid crystal panel disposed under the light guide plate; And A second protective window is in close contact with the sub liquid crystal panel, The second protective window is bonded to the main substrate. 10. The apparatus of claim 9, further comprising an accommodating device that accommodates the liquid crystal panel, the light guide plate, the light source, and the sub liquid crystal panel. And the first protective window and the second protective window are attached to the storage device. The liquid crystal display of claim 10, wherein the second protective window applies pressure to the main substrate.

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