KR20140028327A - Display device - Google Patents

Abstract

According to the present invention, a display device includes: a displaying area; a non-displaying area; a first substrate and a second substrate which are separated and face each other; a signal wiring formed on the displaying area on the inner surface of the first substrate; a color filter layer which is formed on the displaying area on the inner surface of the second substrate; and a black matrix formed on the non-displaying area on the inner surface of the second substrate. The black matrix has an opening in a shape of an identification pattern such as characters or figures. The identification pattern can be recognized by a light passing through the opening.

Description

Display device

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a display device, and more particularly, to a display device capable of implementing a character or figure identification pattern in a non-display area.

As the information society has developed in recent years, demands for the display field have been increasing in various forms. Various types of flat panel displays (FPD) having characteristics such as thinning, light weight, and low power consumption have been developed, A liquid crystal display (LCD), a plasma display panel (PDP), an organic light emitting diode (OLED), and the like have been extensively studied.

Flat panel displays are widely used in notebook computers, computer monitors, portable devices such as personal computers and smart phones, and televisions. The display panels of each flat panel display are modularized through various cases and used for commercialization. Cover and so on.

The display panel has a display area for displaying an image and a non-display area surrounding the display area. The case or cover covers a non-display area, which becomes a bezel area of the product.

Such a case or a cover increases the thickness and weight of the product, and the larger the width of the bezel area, the smaller the size of the display area in the same size display device. Thus, an attempt has been made to provide a borderless product that maximizes the size of the display area in a display device of the same size and has a neat appearance by minimizing the width of the bezel area and omitting or minimizing the case or cover come.

On the other hand, in recent years, a product equipped with a camera on one side has been widely proposed and released so that a user can easily take a picture of himself or herself while viewing a displayed screen, or can use it for a video call or a video conference. However, in order to mount the camera, a certain space is required, and accordingly, the bezel area must also have a certain width.

However, since the bezel area is an area where no image is displayed, most of the area is useless.

In addition, there is a disadvantage in that such a bezel area can not be printed, laser machined, or the like, so that a product of the same design is provided to all users, and a design according to a user's demand can not be provided.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a borderless type display device capable of implementing a character or figure identification pattern in a bezel area.

Another object of the present invention is to provide a borderless type display device having various designs according to a user's request.

According to an aspect of the present invention, there is provided a display device comprising: a first substrate and a second substrate opposing each other and including a display region and a non-display region; A signal wiring formed in a display region of the inner surface of the first substrate; A color filter layer formed on a display region of the inner surface of the second substrate; And a black matrix formed in a non-display area of the inner surface of the second substrate, wherein the black matrix has an opening in the shape of a character or figure identification pattern, and the identification pattern can be recognized by light passing through the opening.

And an auxiliary color filter pattern corresponding to the opening in the non-display area of the inner surface of the second substrate.

The auxiliary color filter pattern has the shape of the identification pattern and is spaced apart from the black matrix and located within the opening.

Alternatively, the auxiliary color filter pattern fills the opening.

The auxiliary color filter pattern may be formed of the same material as any one of the red, green, and blue color filter patterns of the color filter layer, or may be formed by superposing the same material as any of red, .

And a light source corresponding to the opening in the lower portion of the first substrate of the non-display region.

And an auxiliary pattern corresponding to the opening and reflecting light on the inner surface of the first substrate of the non-display area.

The auxiliary pattern is formed of the same material as the signal wiring.

The display device of the present invention further includes a seal pattern in the non-display area between the first substrate and the second substrate, and the seal pattern includes a first pattern and a second pattern positioned between the openings do.

The display device according to the present invention can form an opening in an outer black matrix formed in a non-display area to implement a logo of a company, an ID of a user, or an identification pattern arbitrarily designated by a user. Therefore, various designs can be provided according to the demand of the user.

An auxiliary pattern corresponding to the opening of the outer black matrix may be formed of a metal material used as a material of a gate wiring, a data wiring, or a thin film transistor, and an identification pattern may be realized by reflecting external light.

On the other hand, by forming the auxiliary color filter pattern corresponding to the opening of the outer black matrix, an identification pattern of a specific color can be realized, or a brighter identification pattern can be realized by adding an auxiliary light source corresponding to the opening.

Since the opening of the outer black matrix, the auxiliary pattern, and the auxiliary color filter pattern are formed in the same process as the constituent elements of the display area, no additional process is required.

1 is a plan view schematically showing a liquid crystal display device according to an embodiment of the present invention.
2 is a cross-sectional view illustrating one pixel region of a liquid crystal display device according to an embodiment of the present invention.
3A and 3B are a plan view and a sectional view showing an identification pattern of the liquid crystal display device according to the first embodiment of the present invention.
4A and 4B are a plan view and a sectional view showing an identification pattern of a liquid crystal display device according to a second embodiment of the present invention.
5A and 5B are a plan view and a cross-sectional view showing another example of the identification pattern of the liquid crystal display device according to the second embodiment of the present invention.
6 is a cross-sectional view showing an identification pattern of a liquid crystal display device according to a third embodiment of the present invention.
7 is a cross-sectional view showing an identification pattern of a liquid crystal display device according to a fourth embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

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

As shown in Fig. 1, the liquid crystal display device according to the embodiment of the present invention includes a display area DA for displaying an image and a non-display area NDA surrounding the display area DA. Here, the non-display area NDA corresponds to the bezel area of the product.

In the display area DA, a plurality of pixels that are controlled independently and change the transmittance of light are positioned, and a pad or the like for applying a signal to the pixel is disposed in the non-display area NDA.

The upper end of the non-display area NDA on the drawing has a wider width than the other parts. A camera (not shown) may be positioned at the upper end of the non-display area NDA, and an identification pattern PT such as a character or a graphic is located. The identification pattern PT may be a company logo (LOGO), a user ID (ID), or a pattern arbitrarily designated by the user. When there is a camera, the position of the identification pattern PT can be freely changed within a range that does not overlap the position of the camera.

2 is a cross-sectional view illustrating one pixel region of a liquid crystal display device according to an embodiment of the present invention.

2, the liquid crystal display according to the embodiment of the present invention includes a lower substrate 112 and a second substrate 182 disposed opposite to each other, and two substrates 112 and 182, A liquid crystal layer 190 is disposed.

On the inner surface of the first substrate 112, a gate wiring 122 extending in a first direction and a gate electrode 124 connected thereto are formed. The gate wiring 122 and the gate electrode 124 are formed of a metal material having a relatively low specific resistance. For example, an aluminum alloy such as aluminum (Al), aluminum-neodymium (AlNd), copper (Cu) , Molybdenum (Mo), molybdenum (MoTi), or the like.

Top of the gate wiring 122 and the gate electrode 124 there is a gate insulating film 130 is formed, a gate insulating film 130 is an inorganic insulating material, for example, formed of silicon nitride (SiNx) or silicon oxide (SiO ₂₎ .

An active layer 142 made of intrinsic amorphous silicon and an ohmic contact layer made of impurity-doped amorphous silicon are formed on the gate insulating layer 130 corresponding to the gate electrode 124 144 are formed in this order.

A data line 152 and source and drain electrodes 154 and 156 are formed on the ohmic contact layer 454. The data line 152 extends in the second direction to intersect with the gate line 122 to define a pixel region and the source electrode 154 is connected to the data line 152 to be located above the active layer 142, The drain electrode 156 is spaced apart from the source electrode 154 above the active layer 142.

The data line 152 and the source and drain electrodes 154 and 156 are formed of a metal material having a relatively low resistivity and may be formed of a metal such as aluminum (Al), an aluminum alloy such as aluminum-neodymium (AlNd) ), A copper alloy, molybdenum (Mo), molybdenum (MoTi), or the like.

The gate electrode 124, the active layer 142, and the source and drain electrodes 154 and 156 form a thin film transistor.

The ohmic contact layer 144 is removed between the source and drain electrodes 154 and 156 to expose the underlying active layer 142 and the active layer 142 between the source and drain electrodes 154 and 156 is exposed And becomes a channel of the transistor.

A passivation layer 160 is formed on the data line 152 and the source and drain electrodes 154 and 156 and the passivation layer 160 has a drain contact hole 160a exposing the drain electrode 156. The protective layer 160 may be formed of an organic insulating material of the inorganic insulating material or benzocyclobutene (benzocyclobutene) or the acrylic resin (acrylic resin) of a silicon nitride (SiNx) or silicon oxide (SiO _2). When the protective layer 160 is formed of an organic insulating material, the upper surface of the protective layer 160 may be flat.

A pixel electrode 172 made of a transparent conductive material is formed in a pixel region above the passivation layer 160 and the pixel electrode 172 is in contact with the drain electrode 156 through the drain contact hole 160a. The pixel electrode 172 may be formed of, for example, indium tin oxide or indium zinc oxide.

The first substrate 112 including the gate wiring 122 and the data wiring 152, the thin film transistor and the pixel electrode 172 is referred to as an array substrate.

On the other hand, a black matrix 184 is formed on the inner surface of the second substrate 182, and the black matrix 184 has openings corresponding to the pixel regions. On the inner surface of the second substrate 182, a color filter layer 186 is formed corresponding to the opening of the black matrix 184. The color filter layer 186 includes red, green, and blue color filter patterns (R, G, and B), and one color filter pattern corresponds to one pixel area. A common electrode 188 made of a transparent conductive material is formed on the entire surface of the second substrate 182 under the color filter layer 186.

The black matrix 184 and the second substrate 182 including the color filter layer 186 and the common electrode 188 are referred to as a color filter substrate.

A liquid crystal layer 190 is disposed between the first substrate 112 and the second substrate 182 and more specifically between the pixel electrode 172 and the common electrode 188.

Although the pixel electrode 172 is formed on the first substrate 112 and the common electrode 188 is formed on the second substrate 182 in the present invention, the common electrode 188 may be formed on the first substrate 112 And the common electrode 188 may be arranged alternately with the pixel electrode 182 in a pattern in the pixel region.

Although the thin film transistor is formed on the first substrate 112 and the color filter layer 186 is formed on the second substrate 182 in the present invention, the color filter layer 186, together with the thin film transistor, Or may be formed on the substrate 112.

Such a liquid crystal display device is modularized through a top cover (not shown), a bottom cover (not shown) and a support main (not shown), and the top cover can be omitted or minimized to realize a borderless type.

Hereinafter, an identification pattern implementation method of the present invention will be described with reference to the drawings.

3A and 3B are diagrams showing an identification pattern of the liquid crystal display device according to the first embodiment of the present invention. FIG. 3A is a plan view schematically showing an enlarged view of region A in FIG. 1, And only the elements related to the identification pattern are shown for the sake of convenience.

3A and 3B, the first substrate 112 and the second substrate 182, on which the display area DA and the non-display area NDA are defined, are spaced apart from each other, and the first substrate 112 (Not shown) is disposed in the display area DA between the second substrate 182 and the second substrate 182. [

The seal pattern 192 is formed in the non-display area NDA between the first substrate 112 and the second substrate 182 to prevent leakage of the liquid crystal and to maintain the cell gap between the two substrates 112 and 182 constant .

At this time, the seal pattern 192 may include a first pattern 192a and a second pattern 192b which are spaced apart from each other. The first pattern 192a and the second pattern 192b are located on both sides of the non-display area NDA to support the two substrates 112 and 182 so that even if the width of the non-display area NDA is wide, It can be kept constant. Further, either the first pattern 192a or the second pattern 192b may be omitted.

On the other hand, the liquid crystal layer may be positioned between the first pattern 192a and the second pattern 192b of the seal pattern 192 located in the non-display area NDA.

Here, the seal pattern 192 may be formed in a double structure in only the upper end portion or the upper end portion and the lower end portion of the non-display region NDA in FIG. 1, and the other portions may be formed in a single structure.

An array layer 112a including a gate wiring, a data line, a thin film transistor, and a pixel electrode is formed on the inner surface of the first substrate 112 of the display area DA and the second substrate 182 A color filter layer 186 including a black matrix 184 and red, green, and blue color filter patterns is formed.

Although not shown, a common electrode may be formed on the first substrate 112 or the second substrate 182.

A first polarizing plate 194a is attached to the outer surface of the first substrate 112 and a second polarizing plate 194b is attached to the outer surface of the second substrate 182. [ The first polarizing plate 194a and the second polarizing plate 194b transmit only light parallel to the respective light transmission axes and the light transmission axis of the first polarizing plate 194a and the light transmission axis of the second polarizing plate 194b are perpendicular Respectively.

The first polarizing plate 194a may have a size corresponding to only the display area DA and may have a size corresponding to the display area DA and the non-display area NDA. On the other hand, the second polarizing plate 194b in the direction in which the image is output has a corresponding size up to the display area DA and the non-display area NDA, thereby minimizing the width of the component positioned on the front surface of the liquid crystal display device, Let's implement the lease type.

Although not shown, a backlight unit is disposed under the first polarizer 194a to supply light.

On the other hand, an outer black matrix 185 is formed on the inner surface of the second substrate 182 of the non-display area NDA to prevent light leakage in the non-display area NDA. Here, the outer black matrix 185 has an opening 185a corresponding to an identification pattern shape such as characters or graphics. The identification pattern may be a company logo (LOGO), a user ID (ID), or a pattern arbitrarily designated by the user.

Therefore, the light from the backlight unit passes through the opening 185a so that the user can recognize the identification pattern.

4A and 4B are diagrams showing identification patterns of a liquid crystal display device according to a second embodiment of the present invention. FIG. 4A is a plan view schematically showing an enlarged view of region A in FIG. 1, FIG. 4B is a cross- Sectional view of the region A of FIG. For convenience, only the elements related to the identification pattern are shown, and like numerals are assigned to structures similar to those of the first embodiment, and a description thereof will be simplified.

As shown in FIGS. 4A and 4B, the first substrate 212 and the second substrate 282, which define the display area DA and the non-display area NDA, are spaced apart from each other, (Not shown) is disposed in the display area DA between the second substrate 282 and the second substrate 282.

A seal pattern 292 is formed in the non-display area NDA between the first substrate 212 and the second substrate 282. The seal pattern 292 includes a first pattern 292a spaced apart from the first pattern 292a, 2 pattern 292b. Here, the liquid crystal layer may be positioned between the first pattern 292a and the second pattern 292b of the seal pattern 292 located in the non-display area NDA.

An array layer 212a including a gate wiring, a data line, a thin film transistor and a pixel electrode is formed on the inner surface of the first substrate 212 of the display area DA and the second substrate 282 A color filter layer 286 including a black matrix 284 and red, green and blue color filter patterns is formed. Although not shown, a common electrode may be formed on the first substrate 212 or the second substrate 282.

A first polarizing plate 294a is attached to the outer surface of the first substrate 212 and a second polarizing plate 294b is attached to the outer surface of the second substrate 282. [

Although not shown, a backlight unit is disposed under the first polarizer 294a to supply light.

On the other hand, an outer black matrix 285 is formed on the inner surface of the second substrate 282 of the non-display area NDA to prevent light leakage in the non-display area NDA, and the outer black matrix 285, And has an opening 285a corresponding to the same identification pattern shape. Further, an auxiliary color filter pattern 287 is formed corresponding to the opening 285a.

The auxiliary color filter pattern 287 completely covers the opening 285a and overlaps the outer black matrix 285. [ The auxiliary color filter pattern 287 may have a rectangular shape, as shown in FIG. 4A. However, the auxiliary color filter pattern 287 is not limited to a rectangular shape, and may be variously changed, such as a square, an oval, or a rounded corner.

The auxiliary color filter pattern 287 may be formed of the same material as any of the red, green and blue color filter patterns of the display area DA and may be formed of the same material as any of the red, Or may be formed by overlapping. As an example, the auxiliary color filter pattern 287 may be formed of the same material as the red color filter pattern.

Thus, the light from the backlight unit passes through the auxiliary color filter pattern 287 covering the opening 285a so that the user can recognize the color of the auxiliary color filter pattern 287, for example, the red identification pattern .

5A and 5B are a plan view and a cross-sectional view showing another example of the identification pattern of the liquid crystal display device according to the second embodiment of the present invention. The same reference numerals are given to the same structures as in Figs. 4A and 4B, Is omitted.

As shown in FIGS. 5A and 5B, an outer black matrix 285 is formed on the inner surface of the second substrate 282 of the non-display area NDA to prevent light leakage in the non-display area NDA, The matrix 285 has an opening 285a corresponding to an identification pattern shape such as a character or a graphic. In addition, an auxiliary color filter pattern 287a is formed corresponding to the opening 285a.

At this time, the auxiliary color filter pattern 287a has an identification pattern shape smaller than the opening 285a, and is located in the opening 285a away from the outer black matrix 285. [

The auxiliary color filter pattern 287a may be formed of the same material as any one of the red, green and blue color filter patterns of the display area DA and may be formed of the same material as any of red, Or may be formed by overlapping. As an example, the auxiliary color filter pattern 287a may be formed of the same material as the red color filter pattern.

Therefore, light from the backlight unit passes through the opening 285a and the auxiliary color filter pattern 287a, so that the user can recognize the color of the auxiliary color filter pattern 287a, for example, an identification pattern with a red rim .

6 is a cross-sectional view showing an identification pattern of a liquid crystal display device according to a third embodiment of the present invention. Like numerals are assigned to similar structures to those of the first embodiment, and a description thereof will be simplified.

The first substrate 312 and the second substrate 382 defining the display area DA and the non-display area NDA are spaced apart from each other and facing each other, A liquid crystal layer (not shown) is placed in the display area DA between the two substrates 382.

A seal pattern 392 is formed in a non-display area NDA between the first substrate 312 and the second substrate 382. The seal pattern 392 includes a first pattern 392a spaced apart from the first pattern 392a, 2 pattern 392b. Here, the liquid crystal layer may be positioned between the first pattern 392a and the second pattern 392b of the seal pattern 392 located in the non-display area NDA.

An array layer 312a including a gate wiring, a data line, a thin film transistor and a pixel electrode is formed on the inner surface of the first substrate 312 of the display area DA and the second substrate 382 A color filter layer 386 including a black matrix 384 and red, green, and blue color filter patterns is formed. Although not shown, a common electrode may be formed on the first substrate 312 or the second substrate 382.

A first polarizing plate 394a is attached to the outer surface of the first substrate 312 and a second polarizing plate 394b is attached to the outer surface of the second substrate 382. [

Although not shown, a backlight unit is disposed under the first polarizing plate 394a to supply light.

On the other hand, an outer black matrix 385 is formed on the inner surface of the second substrate 382 of the non-display area NDA to prevent light leakage in the non-display area NDA. The outer black matrix 385, And an opening 385a corresponding to the same identification pattern shape.

An auxiliary pattern 312b is formed on the inner surface of the first substrate 312 of the non-display area NDA corresponding to the opening 385a. The auxiliary pattern 312b is formed of a material reflecting light and may be formed of the same material as the gate wiring or the data wiring among the elements of the array layer 312a of the display area DA.

The auxiliary pattern 312b has a larger area than the total area of the opening 385a and overlaps the opening 385a and the outer black matrix 385. [ At this time, the auxiliary pattern 312b may have a rectangular shape similar to the auxiliary color filter pattern 287 of FIG. 4A. However, the auxiliary pattern 312b is not limited to the rectangular shape, and may be variously changed, such as a square, an ellipse,

Therefore, light from the outside passes through the opening 385a, is reflected by the auxiliary pattern 312b, passes through the opening 385a again, and the user can recognize the identification pattern.

Here, as in the second embodiment, an identification pattern of a specific color may be recognized by adding an auxiliary color filter pattern to the inner surface of the second substrate 382 corresponding to the opening 385a.

FIG. 7 is a cross-sectional view showing an identification pattern of a liquid crystal display device according to a fourth embodiment of the present invention. Like reference numerals are used to designate similar structures to those of the first embodiment, and a description thereof will be simplified.

7, the first substrate 412 and the second substrate 482, in which the display area DA and the non-display area NDA are defined, are spaced apart from each other and facing each other, and the first substrate 412 and the non- A liquid crystal layer (not shown) is placed in the display area DA between the two substrates 482.

A seal pattern 492 is formed in the non-display area NDA between the first substrate 412 and the second substrate 482. The seal pattern 492 includes a first pattern 492a spaced apart from the first pattern 492a, 2 pattern 492b. Here, the liquid crystal layer may be positioned between the first pattern 492a and the second pattern 492b of the seal pattern 492 located in the non-display area NDA.

An array layer 4312a including a gate wiring, a data line, a thin film transistor, and a pixel electrode is formed on the inner surface of the first substrate 412 of the display area DA and the second substrate 482 A color filter layer 486 including a black matrix 484 and red, green and blue color filter patterns is formed. Although not shown, a common electrode may be formed on the first substrate 412 or the second substrate 482.

A first polarizing plate 494a is attached to the outer surface of the first substrate 412 and a second polarizing plate 494b is attached to the outer surface of the second substrate 482. [

Although not shown, a backlight unit is disposed under the first polarizer 494a to supply light.

On the other hand, an outer black matrix 485 is formed on the inner surface of the second substrate 482 of the non-display area NDA to prevent light leakage in the non-display area NDA, and the outer black matrix 485, And has an opening 485a corresponding to the same identification pattern shape.

An auxiliary light source 496 is disposed below the first substrate 312 of the non-display area NDA in correspondence with the opening 485a. The auxiliary light source 496 is formed separately from the backlight unit and may be a light emitting diode.

Thus, light from the auxiliary light source 496 passes through the opening 485a, so that the user can recognize a brighter identification pattern.

Here, as in the second embodiment, an identification pattern of a specific color may be recognized by adding an auxiliary color filter pattern to the inner surface of the second substrate 482 corresponding to the opening 485a.

Although the liquid crystal display device has been described in the embodiments of the present invention, it may be applied to other flat panel display devices such as organic electroluminescent display devices.

The present invention is not limited to the above-described embodiments, and various changes and modifications may be made without departing from the spirit of the present invention.

112: first substrate 112a: array layer
182: second substrate 184: black matrix
185: outer black matrix 185a: opening
186: Color filter layer 192: Seal pattern
192a: first pattern 192b: second pattern
194a: first polarizing plate 194b: second polarizing plate
DA: display area NDA: non-display area

Claims (9)

A first substrate and a second substrate which include a display region and a non-display region and are spaced apart from each other;
A signal wiring formed in a display region of the inner surface of the first substrate;
A color filter layer formed on a display region of the inner surface of the second substrate;
Black matrix formed in the non-display area of the inner surface of the second substrate
And the black matrix has an opening in the form of an identification pattern of a character or a figure, and the recognition pattern can be recognized by light passing through the opening.
The method according to claim 1,
Further comprising an auxiliary color filter pattern corresponding to the opening in the non-display area on the inner surface of the second substrate.
The method according to claim 2,
Wherein the auxiliary color filter pattern has the shape of the identification pattern and is spaced apart from the black matrix and located within the opening.
The method according to claim 2,
Wherein the auxiliary color filter pattern fills the opening.
The method according to claim 2,
The auxiliary color filter pattern may be formed of the same material as any one of the red, green, and blue color filter patterns of the color filter layer, or may be formed by superposing the same material as any of red, Is formed.
The method according to claim 1,
And a light source corresponding to the opening in the lower portion of the first substrate of the non-display region.
The method according to claim 1,
And an auxiliary pattern corresponding to the opening and reflecting light on the inner surface of the first substrate of the non-display area.
The method of claim 7,
Wherein the auxiliary pattern is formed of the same material as the signal wiring.
The method according to any one of claims 1 to 8,
And a seal pattern in the non-display area between the first substrate and the second substrate, wherein the seal pattern includes a first pattern and a second pattern positioned with the opening interposed therebetween Device.

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