KR20170127216A - borderless type Liquid Crystal Display device - Google Patents

Abstract

A liquid crystal display device is provided. The liquid crystal display device includes a liquid crystal panel, a backlight unit, and a printed circuit board. The backlight unit is located between the liquid crystal panel and the printed circuit board. The printed circuit board is electrically connected to the liquid crystal panel by a flexible film. The liquid crystal panel includes a lower substrate positioned to be close to the backlight unit and an upper substrate bonded to the lower substrate. The lower substrate includes a connection region exposed by the upper substrate. The flexible film is connected to the connection region of the lower substrate. The connection region of the lower substrate is covered with a black cover member. Accordingly, the present invention can prevent a light leakage and reduce manufacturing costs.

Description

[0001] The present invention relates to a borderless type liquid crystal display device,

The present invention relates to a borderless type liquid crystal display device in which an outer frame portion is not exposed.

2. Description of the Related Art Generally, electronic devices such as a monitor, a TV, a notebook, a digital camera, and the like include a display device for implementing an image. For example, the display device may include a liquid crystal display device.

The liquid crystal display may implement an image by adjusting the transmittance of liquid crystal. For example, the liquid crystal display device may include a liquid crystal panel including a liquid crystal, and a backlight unit for supplying light to the liquid crystal panel.

In the high-resolution or large-area liquid crystal display device, a borderless type in which a frame is not exposed in order to make a product slimmer, satisfy a design requirement of a consumer, and enhance aesthetics has been proposed. For example, a borderless type liquid crystal display device may cover a flexible film, which electrically connects a liquid crystal panel and a printed circuit board including a circuit for driving the liquid crystal panel, with a decorative cover.

However, in the borderless type liquid crystal display device, when the decorative cover comes into contact with the liquid crystal panel, contact light leakage phenomenon occurs. In addition, in the borderless type liquid crystal display device, since the interval between the decor cover and the liquid crystal panel must be maintained in order to prevent the contact light leakage phenomenon, the limitation of the slimness is set by the decor cover have.

A problem to be solved by the present invention is to provide a liquid crystal display device capable of preventing occurrence of a light leakage phenomenon and improving a sense of beauty.

Another object of the present invention is to provide a liquid crystal display device capable of implementing a borderless type without using a decor cover.

The problems to be solved by the present invention are not limited to the above-mentioned problems. Tasks not mentioned here will be apparent to the ordinarily skilled artisan from the description below.

According to an aspect of the present invention, there is provided a liquid crystal display device including a lower substrate and an upper substrate bonded to the lower substrate, wherein the upper substrate includes a liquid crystal panel ; A printed circuit board positioned on the lower substrate of the liquid crystal panel; A backlight unit positioned between the liquid crystal panel and the printed circuit board; A flexible film for electrically connecting the connection area of the lower substrate and the printed circuit board; And a cover member positioned on the connection region of the lower substrate. The cover member covers one end of the flexible film.

The cover member may be in direct contact with the connection region of the lower substrate.

The cover member may be black.

The cover member may comprise resin or silicon.

The liquid crystal panel may further include an upper polarizer disposed on the upper substrate. The cover member may extend on a side surface of the upper polarizer plate.

The upper surface of the cover member facing the lower substrate may be coplanar with the upper surface of the upper polarizer plate facing the upper substrate.

The cover member may extend on a side surface of the backlight unit, and may surround the flexible film on a side surface of the backlight unit.

The liquid crystal display device includes: a cover bottom housing the backlight unit; And a guide frame positioned on a side surface of the cover bottom. The cover member may completely fill a space between the cover bottom and the soft film and a space between the guide frame and the soft film.

The liquid crystal display device according to the technical idea of the present invention can realize a borderless type without using a deco cover. Accordingly, in the liquid crystal display device according to the technical idea of the present invention, the contact light leakage phenomenon due to the decor cover can be prevented. Therefore, the reliability of the display device according to the technical idea of the present invention can be improved and the manufacturing cost can be reduced.

1 is a view illustrating a liquid crystal display device according to an embodiment of the present invention.
2 is a cross-sectional view taken along line I-I 'of FIG.
3 is a view illustrating a liquid crystal display device according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

In the drawings, the same reference numerals denote the same components throughout the specification. In the drawings, the lengths and the thicknesses of layers or regions may be exaggerated for convenience. In addition, when the first component is described as being on the second component, it is preferable that the first component is located on the upper side in direct contact with the second component, And the third component is located between the second components.

Here, the terms first, second, etc. are used for describing various components and are used for the purpose of distinguishing one component from another component. However, the first component and the second component may be arbitrarily named according to the convenience of the person skilled in the art without departing from the technical idea of the present invention.

It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. For example, an element represented in singular form includes a plurality of elements unless the context clearly dictates a singular number. Also, in the specification of the present invention, the terms such as " comprises "or" having ", and the like, designate the presence of stated features, integers, steps, operations, elements, But do not preclude the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

In addition, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the meaning in the context of the related art and, unless expressly defined in the specification of the present invention, are intended to mean either an ideal or an overly formal meaning It is not interpreted.

(Example)

1 is a view illustrating a liquid crystal display device according to an embodiment of the present invention. 2 is a cross-sectional view taken along line I-I 'of FIG.

1 and 2, a liquid crystal display according to an exemplary embodiment of the present invention includes a liquid crystal panel 100, a backlight unit 200, a printed circuit board 300, a flexible film 410, and a cover member 500 .

The liquid crystal panel 100 may implement an image by adjusting the transmittance of the liquid crystal. The liquid crystal panel 100 may include a lower substrate 110 and an upper substrate 120 bonded to the lower substrate 110. A liquid crystal may be positioned between the lower substrate 110 and the upper substrate 120.

The lower substrate 110 may be a TFT substrate. For example, on the upper surface of the lower substrate 110 facing the upper substrate 120, gate lines, data lines intersecting with the gate lines, and data lines located at intersections of the gate lines and the data lines And the pixel electrodes individually connected to the thin film transistors may be located.

The upper substrate 120 may be a color filter substrate. For example, common electrodes and color filters may be positioned on the lower surface of the upper substrate 120 facing the upper surface of the lower substrate 110.

The common electrode may form an electric field with the pixel electrodes. The electric field between the common electrode and the pixel electrodes can rotate the liquid crystal located in the corresponding region. The transmittance of the rotated liquid crystal can be changed.

The color filters may cause the light passing through the liquid crystal to have a specific color. For example, each color filter can only transmit light of a specific wavelength. The color filters may include a red color filter, a green color filter, and a blue color filter. Each color filter can face the corresponding pixel electrode.

The upper substrate 120 may further include a black matrix (BM) disposed between the color filters. The black matrix may extend onto the non-display area of the upper substrate 120. For example, the black matrix may extend along the edge of the upper substrate 120.

The lower substrate 110 may include a connection area CA. The upper substrate 120 may expose the connection area CA of the lower substrate 110. For example, the upper substrate 120 may have a smaller size than the lower substrate 110.

The liquid crystal panel 100 may further include a lower polarizer 130 and an upper polarizer 140. The lower polarizer 130 may be positioned on the lower surface of the lower substrate 110 facing the upper substrate 120. The upper polarizer 140 may be positioned on the upper surface of the upper substrate 120 facing the lower substrate 110. For example, the lower substrate 110 and the upper substrate 120 may be positioned between the lower polarizer 130 and the upper polarizer 140.

The lower polarizer 130 and the upper polarizer 140 may polarize the transmitted light. The upper polarizer 140 may polarize light in a direction different from that of the lower polarizer 130. For example, the upper polarizer 140 may polarize light in a direction perpendicular to the lower polarizer 130.

The backlight unit 200 may supply light to the liquid crystal panel 100. For example, the backlight unit 200 may be positioned on the lower substrate 110 of the liquid crystal panel 100. The backlight unit 200 may include a light source, a light guide plate, an optical sheet, and a reflector.

The light source may include an LED lamp. The light guide plate can supply the light generated by the light source to the entire liquid crystal panel 100. For example, the light source may be positioned on one side of the light guide plate. The optical sheet can improve the characteristics of light supplied from the light guide plate to the liquid crystal panel 100. For example, the optical sheet may include a diffusion sheet, a lower prism sheet, and an upper prism sheet laminated in order. The reflection plate can improve efficiency of light supplied to the liquid crystal panel 100 by the light guide plate. For example, the reflection plate may reflect light emitted from the light guide plate in a direction opposite to the liquid crystal panel 100 toward the liquid crystal panel 100.

The liquid crystal display device according to the embodiment of the present invention may further include a cover bar 610 for receiving the backlight unit 200 and a light frame 620 coupled to the cover bottom 610. The cover bottom 610 may cover a side surface of the backlight unit 200 and a lower surface of the backlight unit 200 facing the liquid crystal panel 100. The guide frame 620 may engage with the cover bottom 610 on the side of the backlight unit 200. The guide frame 620 may support the lower substrate 110 of the liquid crystal panel 100. For example, the guide frame 620 may be attached to the lower substrate 110 by an adhesive member 630. The adhesive member 630 may include an elastic material to prevent the lower substrate 110 from being damaged by the guide frame 620.

The printed circuit board 300 may provide various signals for implementing the image to the liquid crystal panel 100. The printed circuit board 300 may be positioned on the backlight unit 200. For example, the printed circuit board 300 may be positioned on the cover barter 610 surrounding the lower surface of the backlight unit 200. The backlight unit 200 may be positioned between the liquid crystal panel 100 and the printed circuit board 300.

The flexible film 410 may electrically connect the printed circuit board 300 to the liquid crystal panel 100. For example, one end of the flexible film 410 may be connected to the connection area CA of the lower substrate 110.

The flexible film 410 may be bent along the side surface of the backlight unit 200. For example, the shape of the flexible film 410 on the side of the backlight unit 200 may be semicircular.

The liquid crystal display device according to the embodiment of the present invention may further include a driving IC 420 mounted on the flexible film 410. The driving IC 420 may control the thin film transistors located on the lower substrate 110. For example, the driving IC 420 may be mounted on the surface of the flexible film 410 facing the backlight unit 200.

The cover member 500 may cover the upper surface of the lower substrate 110 exposed by the upper substrate 120. The cover member 500 may be positioned on the connection area CA of the lower substrate 110. The connection area CA of the lower substrate 110 may be covered with the cover member 500. The cover member 500 may cover the one end of the flexible film 410 connected to the connection area CA of the lower substrate 110.

The cover member 500 may be in direct contact with the connection area CA of the lower substrate 110. For example, the connection area CA of the lower substrate 110 may be completely covered by the cover member 500.

The liquid crystal display device according to the embodiment of the present invention is configured such that the connection area CA of the lower substrate 110 electrically connected to the printed circuit board 300 by the flexible film 410 is covered by the cover member 500 . Accordingly, the liquid crystal display device according to the embodiment of the present invention can prevent the connection area CA of the lower substrate 110 from being exposed to the outside without using a separate structure such as a décor cover or the like. Therefore, in the liquid crystal display device according to the embodiment of the present invention, occurrence of contact light leakage phenomenon can be prevented, and a borderless type can be realized.

The cover member 500 may be the same color as the black matrix. For example, the cover member 500 may be black. The cover member 500 may include a material that can be applied in a liquid state. For example, the cover member 500 may include resin or silicon.

In the liquid crystal display device according to the embodiment of the present invention, the cover member 500 may be of the same black color as the black matrix. Accordingly, in the liquid crystal display device according to the embodiment of the present invention, the connection area CA of the same lower substrate 110 as the black matrix of the liquid crystal panel 100 is positioned by the cover member 500 Can be seen. That is, in the liquid crystal display device according to the embodiment of the present invention, the sense of heterogeneity caused by the cover member 500 can be reduced. Therefore, in the liquid crystal display device according to the embodiment of the present invention, a borderless type that minimizes a sense of heterogeneity can be realized.

The cover member 500 may extend on the side surface of the backlight unit 200. The cover member 500 may surround the flexible film 410 on the side surface of the backlight unit 200. For example, the space between the cover bottom 610 and the flexible film 410 and the space between the guide frame 620 and the flexible film 410 may be completely filled with the cover member 500 . The driving IC 420 may be covered with the cover member 500.

The liquid crystal display device according to the embodiment of the present invention is described as a structure in which the backlight unit 200 is housed by the cover member 500 and that the space between the flexible films 410 is completely filled. Accordingly, in the liquid crystal display device according to the embodiment of the present invention, the flow of the flexible film 410 can be prevented by the cover member 500. Therefore, in the liquid crystal display device according to the embodiment of the present invention, the reliability of electrical connection between the liquid crystal panel 100 and the printed circuit board 300 can be improved.

The lower surface of the cover member 500 facing the same direction as the lower surface of the backlight unit 200 facing the liquid crystal panel 100 may be located outside the lower surface of the backlight unit 200. For example, the lower surface of the cover member 500 may be coplanar with the lower surface facing the outer side of the cover bottom 610.

The cover member 500 may extend along a side surface of the upper substrate 120. For example, the upper surface of the cover member 500 facing the lower substrate 110 may be coplanar with the upper surface of the upper substrate 120.

The liquid crystal display device according to the embodiment of the present invention may have the cover member 500 positioned between the upper surface of the upper substrate 120 and the lower surface of the cover bottom 610 on the side surface of the backlight unit 200. Accordingly, in the liquid crystal display device according to the embodiment of the present invention, the overall thickness of the cover member 500 can be prevented from increasing.

As a result, in the liquid crystal display device according to the embodiment of the present invention, the connection area CA of the lower substrate 110 to which the flexible film 410 is connected is covered with the cover member 500 and a separate configuration such as a decor cover is used The connection region CA of the lower substrate 110 is prevented from being exposed to the outside, thereby preventing the contact light leakage phenomenon and realizing the borderless type. In addition, in the liquid crystal display device according to the embodiment of the present invention, since the decor cover is not used, the slimness can be prevented from being limited for improving the beauty, and the manufacturing cost can be reduced.

The liquid crystal display device according to the embodiment of the present invention is described in which the cover member 500 includes the same plane as the upper substrate 120. However, as shown in FIG. 3, in the liquid crystal display device according to another embodiment of the present invention, the cover member 500 may extend on the side surface of the upper polarizer 140. For example, in the liquid crystal display device according to another embodiment of the present invention, the cover member 500 may include the same plane as the upper polarizer 140. Accordingly, in the liquid crystal display device according to another embodiment of the present invention, the sense of shearing due to the step between the liquid crystal panel 100 and the cover member 500 can be minimized. Therefore, in the liquid crystal display device according to another embodiment of the present invention, a borderless type in which a sense of heterogeneity is minimized and slimness can be realized can be realized.

100: liquid crystal panel 200: backlight unit
300: printed circuit board 410: flexible film
500: cover member

Claims (8)

A liquid crystal panel including a lower substrate and an upper substrate bonded to the lower substrate, the upper substrate exposing a connection region of the lower substrate;
A printed circuit board positioned on the lower substrate of the liquid crystal panel;
A backlight unit positioned between the liquid crystal panel and the printed circuit board;
A flexible film for electrically connecting the connection area of the lower substrate and the printed circuit board; And
And a cover member positioned on the connection region of the lower substrate and covering one end of the flexible film. The method according to claim 1,
And the cover member is in direct contact with the connection region of the lower substrate. The method according to claim 1,
Wherein the cover member is black. The method of claim 3,
Wherein the cover member comprises resin or silicon. The method according to claim 1,
The liquid crystal panel may further include an upper polarizer disposed on the upper substrate,
And the cover member extends on a side surface of the upper polarizer. 6. The method of claim 5,
Wherein an upper surface of the cover member facing the lower substrate is coplanar with an upper surface of the upper polarizer plate facing the upper substrate. The method according to claim 1,
Wherein the cover member extends on a side surface of the backlight unit, and surrounds the flexible film on a side surface of the backlight unit. 8. The method of claim 7,
A cover bottom housing the backlight unit; And
Further comprising a guide frame positioned on a side of the cover bottom,
Wherein the cover member completely fills a space between the cover bottom and the flexible film and a space between the guide frame and the flexible film.

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