KR102387550B1 - Display device - Google Patents

Abstract

A display device according to an embodiment of the present invention includes a substrate having a plurality of pixels including a light emitting area defined therein, a plurality of gate wirings and a plurality of common wirings extending in a row direction at a boundary between the plurality of pixels, a plurality of gate wirings, and a plurality of connected thin film transistors, an auxiliary active layer overlapping the gate wiring and the common wiring, and a plurality of dummy color filters overlapping the plurality of thin film transistors, the plurality of gate wirings, the plurality of common wirings and the auxiliary active layer. Accordingly, the auxiliary active layer and the dummy color filter overlapped instead of the black matrix may minimize color mixing between the plurality of pixels.

Description

display device {DISPLAY DEVICE}

The present invention relates to a display device, and more particularly, to a display device capable of replacing a black matrix and improving cell gap uniformity using a thin film transistor and a color filter.

Recently, as we enter the information age, the field of display that visually expresses electrical information signals has developed rapidly, and in response to this, various display devices with excellent performance of thinness, light weight, and low power consumption have been developed. is being developed Examples of such a display device include a liquid crystal display device (LCD), an organic light emitting display device (OLED), and the like.

In general, a liquid crystal display device includes a lower substrate on which various wirings and thin film transistors are disposed, an upper substrate on which a color filter and a black matrix are disposed, and a liquid crystal layer disposed between the upper substrate and the lower substrate. However, since a bonding error may occur in the process of bonding the lower substrate and the upper substrate, the design is designed with a margin in the black matrix. However, since the aperture area is reduced by the margin in the black matrix, the aperture ratio and luminance may be reduced.

Accordingly, a color filter on TFT (COT) structure capable of minimizing a bonding error by disposing a color filter and a black matrix on a lower substrate rather than an upper substrate has been proposed. However, since the liquid crystal display of the COT structure uses the black matrix as it is, there is a limitation in improving the aperture ratio, and the process for forming the black matrix and the color filter is also complicated.

The problem to be solved by the present invention is to prevent color mixing at the boundary between a plurality of pixels by using a dummy color filter and an auxiliary active layer instead of deleting the black matrix, and at the same time minimize the step difference in the planarization layer by configuring the dummy color filter as a single layer, , to provide a display device capable of improving cell gap uniformity.

Another object of the present invention is to provide a display device in which a process for forming a black matrix is simplified and an aperture ratio is improved.

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

In order to solve the above problems, a display device according to an embodiment of the present invention includes a substrate on which a plurality of pixels including a light emitting area are defined, a plurality of gate wirings extending in a row direction at a boundary between the plurality of pixels, and a plurality of the plurality of pixels. of a common wiring, a plurality of thin film transistors connected to the plurality of gate wirings, a gate wiring and an auxiliary active layer overlapping the common wiring, and a plurality of thin film transistors, a plurality of gate wirings, a plurality of overlapping the plurality of common wirings and the auxiliary active layer It contains a dummy color filter. Accordingly, the auxiliary active layer and the dummy color filter overlapped instead of the black matrix may minimize color mixing between the plurality of pixels.

A display device according to another exemplary embodiment includes a substrate on which a plurality of pixels are disposed, a gate line and a common line extending in a first direction at a boundary between the plurality of pixels, a gate electrode extending from the gate line, and an active on the gate electrode a thin film transistor including a layer and a source electrode and a drain electrode on the active layer, an auxiliary active layer disposed to cover the gate wiring and the common wiring at the boundary between the plurality of pixels, and a first so as to cover the boundary between the plurality of pixels and a dummy color filter extending in the direction. Accordingly, since the dummy color filter and the auxiliary active layer function as a black matrix, the black matrix process can be eliminated, and the process is simplified.

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

According to the present invention, color mixing between a plurality of pixels can be prevented by overlapping a dummy color filter and an auxiliary active layer instead of a black matrix.

According to the present invention, the step difference of the planarization layer can be improved and the uniformity of the cell gap can be improved by configuring the dummy color filter as a single layer.

The present invention can improve the aperture ratio by eliminating the black matrix.

The effect according to the present invention is not limited by the contents exemplified above, and more various effects are included in the present invention.

1 is a plan view of a display device according to an exemplary embodiment.
FIG. 2 is an enlarged view of A of FIG. 1 .
3 is a cross-sectional view taken along line III-III' of FIG. 2 .
4 is a plan view schematically illustrating a color filter and a dummy color filter.
5 is a light absorption spectrum of an auxiliary active layer and a blue dummy color filter.
6 is an enlarged view of A in a display device according to another exemplary embodiment.
7 is a cross-sectional view taken along line VII-VII' of FIG. 6 .

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be embodied in various different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the technical field to which the present invention pertains It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims.

The shapes, sizes, proportions, angles, numbers, etc. disclosed in the drawings for explaining the embodiments of the present invention are illustrative and the present invention is not limited to the illustrated matters. Like reference numerals refer to like elements throughout. In addition, in describing the present invention, if it is determined that a detailed description of a related known technology may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. When 'includes', 'have', 'consists of', etc. mentioned in the present invention are used, other parts may be added unless 'only' is used. When a component is expressed in the singular, cases including the plural are included unless otherwise explicitly stated.

In interpreting the components, it is construed as including an error range even if there is no separate explicit description.

In the case of a description of the positional relationship, for example, when the positional relationship of two parts is described as 'on', 'on', 'on', 'beside', etc., 'right' Alternatively, one or more other parts may be positioned between two parts unless 'directly' is used.

Reference to a device or layer “on” another device or layer includes any intervening layer or other device directly on or in the middle of the other device or layer.

Also, although the first, second, etc. are used to describe various components, these components are not limited by these terms. These terms are only used to distinguish one component from another. Accordingly, the first component mentioned below may be the second component within the spirit of the present invention.

Like reference numerals refer to like elements throughout.

The size and thickness of each component shown in the drawings are illustrated for convenience of description, and the present invention is not necessarily limited to the size and thickness of the illustrated component.

Each feature of the various embodiments of the present invention can be partially or wholly combined or combined with each other, technically various interlocking and driving are possible, and each of the embodiments may be independently implemented with respect to each other or implemented together in a related relationship. may be

Hereinafter, the present invention will be described with reference to the drawings.

1 is a plan view of a display device according to an exemplary embodiment. In FIG. 1 , only the lower substrate 101 , the gate line GL, the common line CL, the data line DL, and the pixel PX are illustrated among various components of the display device 100 for convenience of explanation. .

First, the lower substrate 101 is configured to support various components included in the display device 100 and may be made of an insulating material. For example, the substrate may be made of a plastic material such as glass or polyimide.

The lower substrate 101 includes a display area A/A and a non-display area N/A.

The display area A/A is an area in which a plurality of pixels PX are arranged to display an image. A pixel PX including a light emitting area for displaying an image and a driving circuit for driving the pixel PX may be disposed in the display area A/A.

The non-display area N/A is an area in which an image is not displayed, and is an area in which various wirings and circuits for driving the pixels PX and a driving circuit disposed in the display area A/A are disposed. Various ICs such as a gate driver IC and a data driver IC may be disposed in the non-display area N/A.

A plurality of gate lines GL and a plurality of common lines CL are disposed on the lower substrate 101 . The gate line GL may transmit a gate voltage to the plurality of pixels PX connected to the gate line GL. The common line CL may transmit a common voltage to the plurality of pixels PX connected to the common line CL. The plurality of gate lines GL and the plurality of common lines CL extend in a first direction, for example, a row direction, at a boundary between the plurality of pixels PX. In this case, one gate line GL and one common line CL may be disposed at the boundary between the plurality of pixels PX, respectively.

A plurality of data lines DL are disposed on the lower substrate 101 . The data line DL may transmit a data voltage to the plurality of pixels PX connected to the data line DL. The plurality of data lines DL extend in a second direction different from the first direction, for example, in a column direction at the boundary between the plurality of pixels PX. Accordingly, the plurality of data lines DL arranged in the second direction and the plurality of gate lines GL and the plurality of common lines CL arranged in the first direction may cross each other.

The lower substrate 101 is not limited to the gate line GL, the common line CL, and the data line DL, and various lines may be further disposed, and the arrangement and design of the lines may be variously changed.

A plurality of pixels PX are disposed on the lower substrate 101 . The pixel PX is a minimum unit constituting the display area A/A, and each of the plurality of pixels PX includes a light emitting area. In this case, a display element for emitting light in the light emitting area may be disposed in each of the plurality of pixels PX. The display device may be defined differently depending on the type of the display device 100 , and may be, for example, a liquid crystal display device or an organic light emitting device, but is not limited thereto. Hereinafter, it is assumed that the display element is a liquid crystal display element for convenience of description.

A driving circuit is further disposed to drive the display element of the pixel PX. The driving circuit may be disposed at the boundary between the plurality of pixels PX and may include the thin film transistor 110 and the capacitor 120 , but is not limited thereto.

Hereinafter, the pixel PX and the driving circuit will be described in more detail with reference to FIGS. 2 and 3 .

FIG. 2 is an enlarged view of A of FIG. 1 . 3 is a cross-sectional view taken along line III-III' of FIG. 2 . 2 and 3 , a display device according to an exemplary embodiment includes a lower substrate 101 , a buffer layer 101 , a gate insulating layer 103 , a passivation layer 104 , a planarization layer 105 , It includes a gate line GL, a data line DL, a common line CL, a pixel electrode 151 , a thin film transistor 110 , a capacitor 120 , and a color filter. In FIG. 2 , illustration of the color filter is omitted for convenience of illustration.

A buffer layer 101 is disposed on the lower substrate 101 . The buffer layer 101 may prevent diffusion of moisture or impurities from the lower substrate 101 . The buffer layer 101 may be formed of a single layer or a multilayer of silicon oxide (SiOx) or silicon nitride (SiNx), but is not limited thereto. In addition, the buffer layer 101 may be omitted depending on the embodiment.

The thin film transistor 110 is disposed on the buffer layer 101 . In the display device 100 , the thin film transistor 110 may be used as a switching and/or driving device. The thin film transistor 110 includes a gate electrode 111 , an active layer 112 , a source electrode 113 , and a drain electrode 113 . The thin film transistor 110 in the display device 100 according to an embodiment of the present invention includes a gate electrode 111 , an active layer 112 on the gate electrode 111 , and a source electrode ( ) on the active layer 112 . 113) and the drain electrode 113 are disposed, and the thin film transistor 110 has a bottom gate structure in which the gate electrode 111 is disposed at the bottom.

The gate electrode 111 extends from the gate line GL. Accordingly, the gate electrode 111 may be formed of the same material as the gate line GL. The gate electrode 111 may be formed of a conductive material, for example, copper (Cu), aluminum (Al), molybdenum (Mo), or an alloy thereof, but is not limited thereto.

A gate insulating layer 103 is disposed on the gate electrode 111 . The gate insulating layer 103 is a layer for insulating the active layer 112 and the gate electrode 111 and may be made of an insulating material. For example, the gate insulating layer 103 may be formed of a single layer or a multilayer of silicon oxide (SiOx) or silicon nitride (SiNx), but is not limited thereto.

An active layer 112 is disposed on the gate insulating layer 103 . The active layer 112 is disposed to overlap the gate electrode 111 . The active layer 112 may be formed of amorphous silicon, polycrystalline silicon, an oxide semiconductor, or an organic semiconductor.

A source electrode 113 and a drain electrode 113 are disposed on the active layer 112 . The source electrode 113 and the drain electrode 113 are spaced apart from each other on the same layer. The source electrode 113 and the drain electrode 113 are electrically connected to the active layer 112 in a manner in contact with the active layer 112 . The source electrode 113 and the drain electrode 113 may be formed of a conductive material, for example, copper (Cu), aluminum (Al), molybdenum (Mo), or an alloy thereof, but is not limited thereto.

The source electrode 113 may extend from the data line DL. Accordingly, the source electrode 113 may be formed of the same material as the data line DL. Although the source electrode 113 is illustrated as being connected to the data line DL in FIG. 2 , the drain electrode 113 may be connected to the data line DL depending on the type of the thin film transistor 110 .

A capacitor 120 is disposed on the buffer layer 101 . The capacitor 120 may store a common voltage applied to the common line CL. The capacitor 120 includes a first capacitor electrode 121 and a second capacitor electrode 122 .

The first capacitor electrode 121 extends from the common line CL. Accordingly, the first capacitor electrode 121 may be formed of the same material as the common wiring CL.

A second capacitor electrode 122 is disposed on the first capacitor electrode 121 with the gate insulating layer 103 interposed therebetween. The second capacitor electrode 122 extends from the drain electrode 113 . Accordingly, the second capacitor electrode 122 may be formed of the same material as the drain electrode 113 .

A pixel electrode 151 electrically connected to the drain electrode 113 is disposed in the pixel PX. A pixel PX voltage is transmitted to the pixel electrode 151 through the thin film transistor 110 , and an electric field is formed using a voltage difference with the common electrode to control the arrangement of liquid crystal molecules.

A passivation layer 104 is disposed on the thin film transistor 110 and the capacitor 120 . The passivation layer 104 is an insulating layer for protecting the thin film transistor 110 . The passivation layer 104 may be made of the same material as the gate insulating layer 103 , and may be formed of a single layer or a multilayer of silicon oxide (SiOx) or silicon nitride (SiNx), but is not limited thereto.

A dummy color filter 140 and a plurality of color filters R, G, and B are disposed on the passivation layer 104 . For a more detailed description of the color filters R, G, and B and the dummy color filter 140, they will be described with reference to FIG. 4 together.

4 is a plan view schematically illustrating a color filter and a dummy color filter.

Referring to FIG. 4 , a red color filter R, a green color filter G, and a blue color filter B are disposed in each of the plurality of pixels PX. The plurality of pixels PX may include a pixel PX in which red light is implemented, a pixel PX in which green light is implemented, and a pixel PX in which blue light is implemented. In addition, a red color filter (R) is applied to a pixel (PX) emitting red light, a green color filter (G) is applied to a pixel (PX) emitting green light, and a blue color filter (B) is applied to a pixel (PX) emitting blue light. ) can be placed.

Specifically, each of the plurality of pixels PX includes a light emitting area, and light emitted from the light emitting area passes through the color filters R, G, and B disposed in each of the plurality of pixels PX and is converted into various colors. can be In FIG. 4 , it is illustrated that the color filters R, G, and B disposed in each of the pixels PX are a red color filter R, a green color filter G, and a blue color filter B, but the color filter R , G, B) may further include a cyan color filter, a magenta color filter, a yellow color filter, a white color filter, and the like, but is not limited thereto.

The dummy color filter 140 is disposed in a space between two pixels PX adjacent in a column direction among the plurality of pixels PX. The dummy color filter 140 may extend in the first direction from the boundary between the plurality of pixels PX to cover the boundary between the plurality of pixels PX. Accordingly, the dummy color filter 140 includes the plurality of thin film transistors 110 disposed along the row direction at the boundary between the plurality of pixels PX, the plurality of gate wirings GL and the plurality of common wirings extending along the row direction. Each can be nested in (CL).

The blue color filter B and the dummy color filter 140 disposed on the passivation layer 104 may be formed of the same material in the same layer. That is, the dummy color filter 140 may be a blue dummy color filter 140 . Accordingly, the blue color filter B disposed in the pixel PX and the dummy color filter 140 disposed at the boundary between the pixel PX may form a mesh shape. In addition, the red color filter R and the green color filter G disposed in each of the pixels PX may have an island shape.

Referring back to FIGS. 2 and 3 , the planarization layer 105 is disposed on the dummy color filter 140 . The planarization layer 105 planarizes an upper portion of the lower substrate 101 . The planarization layer 105 may be configured as a single layer or a multilayer, and may be made of an organic material. For example, the planarization layer 105 may be made of an acryl-based organic material, but is not limited thereto.

Referring back to FIGS. 2 and 3 , the auxiliary active layer 130 is disposed on the same layer as the active layer 112 of the thin film transistor 110 . The auxiliary active layer 130 extends from the active layer 112 to form an integral body with the active layer 112 . Accordingly, the auxiliary active layer 130 is formed of the same material on the same layer as the active layer 112 .

In detail, the auxiliary active layer 130 is disposed to cover the gate line GL and the common line CL at the boundary between the plurality of pixels PX. In other words, the auxiliary active layer 130 may be disposed to fill a space between two pixels PX extending in the second direction among the plurality of pixels PX.

However, the auxiliary active layer 130 may overlap only a portion of the gate line GL and the common line CL extending in the first direction rather than overlapping the entire area. For example, the data line DL of one side of one pixel PX is the first data line DL1 , and the data line DL of the other side of one pixel PX is the second data line DL1 . DL2), the auxiliary active layer 130 is disposed to fill a space between the first data line DL1 and the second data line DL2. That is, the active layer 112 of one thin film transistor 110 and the auxiliary active layer 130 extending from the active layer 112 are disposed between the first data line DL1 and the second data line DL2 . .

In this case, the auxiliary active layer 130 may be spaced apart from the second data line DL2 . The active layer 112 may be electrically connected to the first data line DL1 through the source electrode 113 connected to the first data line DL1 . In this case, if the auxiliary active layer 130 integral with the active layer 112 extends to contact the second data line DL2 , the active layer 112 and the auxiliary active layer 130 form the first data line DL1 . ) and the second data line DL2 may be electrically connected. The first data line DL1 and the second data line DL2 may allow different data voltages to be applied to different pixels PX. The first data line DL1 and the second data line DL2 are electrically connected to each other. , it may be difficult to drive the pixel PX. Accordingly, the auxiliary active layer 130 may be disposed to be spaced apart from the second data line DL2 .

Meanwhile, the auxiliary active layer 130 may overlap the dummy color filter 140 . As described above, the dummy color filter 140 is disposed in a space between two pixels PX adjacent to each other in the second direction and includes the plurality of thin film transistors 110 , the plurality of gate lines GL, and the plurality of common lines ( CL). The auxiliary active layer 130 is disposed in a space between two pixels PX adjacent in the second direction and between the data lines DL disposed on one side and the other side of one pixel PX, respectively. , overlaps a portion of the gate line GL and the common line CL. Accordingly, the entire area of the auxiliary active layer 130 may also overlap the gate line GL and the common line CL and the dummy color filter 140 overlapping the thin film transistor 110 .

Meanwhile, the blue dummy color filter 140 and the auxiliary active layer 130 may replace the black matrix. A more detailed description thereof will be described with reference to FIG. 5 .

5 is a light absorption spectrum of an auxiliary active layer and a blue dummy color filter. Referring to FIG. 5 , the horizontal axis represents the wavelength of light transmitted through the auxiliary active layer 130 and the blue dummy color filter 140 , and the vertical axis represents the amount of light transmitted.

Referring to FIG. 5 , the auxiliary active layer 130 transmits light having a wavelength of about 530 nm to 780 nm and absorbs light having a wavelength of 380 nm to 530 nm. For example, when the auxiliary active layer 130 is made of amorphous silicon, since the amorphous silicon has a reddish-brown color, light of a long wavelength region corresponding to red light is transmitted and light of a short wavelength region other than red light is absorbed. On the other hand, the blue dummy color filter 140 transmits light having a wavelength of about 380 nm to 630 nm, which is a short wavelength region corresponding to blue light, and transmits a wavelength of 630 nm to 780 nm, which is a long wavelength region that does not correspond to blue light. The light it has is absorbed.

The auxiliary active layer 130 and the blue dummy color filter 140 transmit and absorb light having opposite wavelength ranges. If light is incident toward the auxiliary active layer 130 and the blue dummy color filter 140 , light having a wavelength of 380 nm to 530 nm is absorbed in the auxiliary active layer 130 and 530 nm to 780 nm Light having a wavelength of is transmitted, but light having a wavelength of 530 nm to 780 nm is absorbed without passing through the blue dummy color filter 140 . Accordingly, since the wavelength of light absorbed by the auxiliary active layer 130 and the blue dummy color filter 140 of about 380 nm to 780 nm corresponds to the visible light region, the auxiliary active layer 130 and the blue dummy color filter 140 . ) overlap, light passes through the auxiliary active layer 130 and the blue dummy color filter 140 , light in the visible light region is absorbed, and only light having a wavelength that is not recognized by humans is transmitted.

Accordingly, the blue dummy color filter 140 and the auxiliary active layer 130 disposed to overlap each other at the boundary of each pixel PX absorb light in the visible ray region, and thus serve as a black matrix for preventing color mixing. can

Conventionally, instead of a black matrix, a red dummy color filter and a blue dummy color filter are arranged in multiple layers, and a planarization layer is arranged to planarize the upper portions of the red dummy color filter and the blue dummy color filter, so that two dummy color filters are stacked. to replace the black matrix. However, when the dummy color filter is configured in multiple layers, since the height of the dummy color filter is higher than the height at which the planarization layer can be planarized, the planarization layer cannot planarize the upper part of the dummy color filter at the position where the dummy color filter is disposed. , a portion protruding from the planarization layer may be generated to form a step in the planarization layer. For example, the color filters may be stacked to a height of about 2 μm, and the planarization layer may be planarized to a height of about 1 to 2 μm. When the dummy color filters are successively stacked, the red dummy color filter and the blue dummy color filter have a height of about 4 μm, and the planarization layer has a height of 1 to 2 μm much lower than that, so a step is formed in the planarization layer. can be Accordingly, an inclined portion is generated around the region where the dummy color filter is disposed on the top surface of the planarization layer, and accordingly, a cell gap is changed in the corresponding region, thereby causing a decrease in transmittance and distortion of an image.

Accordingly, in the display device 100 according to an embodiment of the present invention, the auxiliary active layer 130 and the blue dummy color filter 140 are overlapped instead of the black matrix to prevent color mixing. Specifically, the auxiliary active layer 130 formed of the same material as the active layer 112 is disposed on the same layer as the active layer 112 of the thin film transistor 110 . The auxiliary active layer 130 is disposed to overlap the gate line GL and the common line CL at the boundary between the plurality of pixels PX. In addition, the blue dummy color filter 140 is disposed to overlap the thin film transistor 110 , the gate line GL, and the common line CL at the boundary between the plurality of pixels PX. Therefore, the auxiliary active layer 130 and the dummy color filter 140 overlap in a portion of the boundary between the plurality of pixels PX. At this time, since the auxiliary active layer 130 is formed to have the same thickness as the active layer 112 in the same layer as the active layer 112 , the thickness increase between the lower substrate 101 and the passivation layer 104 is not increased even if the auxiliary active layer 130 is further disposed. can be insignificant. Accordingly, the increase in the substantial thickness due to the arrangement of the auxiliary active layer 130 is insignificant, and since the dummy color filter 140 is also arranged as a single layer, it is difficult for the planarization layer 105 to form an inclined portion due to an excessive step difference. can be minimized, and the uniformity of the cell gap can also be improved.

In addition, in the display device 100 according to an embodiment of the present invention, the auxiliary active layer 130 and the dummy color filter 140 are overlapped instead of the black matrix to prevent color mixing between the plurality of pixels PX. . The sum of the wavelength ranges of the light absorbed by the auxiliary active layer 130 and the dummy color filter 140 is a visible light region, and since light mixed at the boundary between the plurality of pixels PX is absorbed, it can function as a black matrix. there is. In addition, there is an effect that the aperture ratio can be improved by eliminating the black matrix.

In addition, the auxiliary active layer 130 and the dummy color filter 140 that can function as a black matrix may be disposed only through an existing process without a separate process for forming the black matrix. When the thin film transistor 110 is formed on the lower substrate 101 , the auxiliary active layer 130 may be formed together when the active layer 112 is deposited and etched. And when the red color filter R, the green color filter G, and the blue color filter B are formed in each of the plurality of pixels PX, the blue color filter B is formed in a mesh shape to form a blue dummy color filter (140) can be formed together. Accordingly, since the auxiliary active layer 130 and the dummy color filter 140 that can function as a black matrix are disposed using only the existing process, the process can be simplified.

6 is an enlarged view of A in a display device according to another exemplary embodiment. 7 is a cross-sectional view taken along line VII-VII' of FIG. 6 . The display device 200 of FIG. 6 is different from the display device 100 of FIG. 1 only in the auxiliary active layer 230 and the column spacer CS, and other configurations are substantially the same. do.

6 and 7 , the auxiliary active layer 230 fills a space between two pixels PX extending in the second direction among the plurality of pixels PX, and is spaced apart from the thin film transistor 110 . are placed In this case, the auxiliary active layer 230 is disposed to be spaced apart from each other on the first data line DL1 and the second data line DL2 . Accordingly, the auxiliary active layer 230 is a space between the two pixels PX extending in the second direction and an island in the space between the first data line DL1 and the second data line DL2 . shape can be arranged.

The column spacer CS is disposed at a boundary between the plurality of pixels PX on the planarization layer 105 . Specifically, the column spacer CS is disposed to overlap a space between the gate line GL and the common line CL. The column spacer CS may support the upper substrate 161 and the lower substrate 101 to maintain a cell gap constant. The column spacer CS may be disposed only on some boundaries, not all of the boundaries between the plurality of pixels PX.

In addition, the column spacer CS may be formed of a light blocking material. The column spacer CS made of a light blocking material may function as a black column spacer CS. That is, the column spacer CS made of the light blocking material may simultaneously function as the black matrix and the column spacer CS.

The gate line GL and the common line CL are made of a metal material to partially block light leaking from the lower portions of the gate line GL and the common line CL toward the upper substrate 161 . However, if a separate light blocking member is not disposed in the space between the gate line GL and the common line CL, light leakage may occur. When light leakage occurs in a region other than the pixel PX, image distortion such as color mixing may occur. Accordingly, it is possible to minimize light leakage and maintain a cell gap by disposing a column spacer CS made of a light blocking material in a space between the gate line GL and the common line CL, which are prone to light leakage.

In the display device 200 according to another embodiment of the present invention, since the auxiliary active layer 230 is disposed to be spaced apart from the thin film transistor 110 , the first data line DL1 , and the second data line DL2 , the island It can be configured in a shape. The auxiliary active layer 230 is a space between the two pixels PX extending in the second direction and only fills the space between the first data line DL1 and the second data line DL2, and the auxiliary active layer 230 is an auxiliary active layer. The shape of the layer 230 may be variously configured. In addition, light leakage may be minimized by disposing column spacers CS made of a light blocking material in addition to the auxiliary active layer 230 and the dummy color filter 140 . In particular, the column spacer CS is disposed to overlap the space between the gate line GL and the common line CL, and the plurality of pixels PX together with the auxiliary active layer 230 and the dummy color filter 140 . The effect of reducing the color mixture between the livers can be maximized. Accordingly, in the display device 200 according to another exemplary embodiment of the present invention, the shape of the auxiliary active layer 230 can be freely configured, and thus the design freedom is high, and color mixing is prevented by further disposing a column spacer CS made of a light blocking material. There is an effect that can further enhance the effect.

A display device according to various embodiments of the present disclosure may be described as follows.

A display device according to an embodiment of the present invention includes a substrate having a plurality of pixels including a light emitting area defined therein, a plurality of gate wirings and a plurality of common wirings extending in a row direction at a boundary between the plurality of pixels, a plurality of gate wirings, and a plurality of connected thin film transistors, an auxiliary active layer overlapping the gate wiring and the common wiring, and a plurality of dummy color filters overlapping the plurality of thin film transistors, the plurality of gate wirings, the plurality of common wirings and the auxiliary active layer.

According to another feature of the present invention, the auxiliary active layer may be spaced apart from the thin film transistor.

According to another feature of the present invention, the thin film transistor may include a gate electrode connected to the gate wiring, an active layer on the gate electrode, and source and drain electrodes on the active layer.

According to another feature of the present invention, the auxiliary active layer may extend from the active layer to form an integral body with the active layer.

According to another feature of the present invention, the dummy color filter may be disposed in a space between two pixels adjacent in a column direction among the plurality of pixels.

According to another feature of the present invention, the entire area of the auxiliary active layer may overlap the dummy color filter.

According to another feature of the present invention, it further includes a passivation layer covering the thin film transistor, and a red color filter, a green color filter, and a blue color filter disposed on the passivation layer in each of the plurality of pixels, wherein the dummy color filter is blue It may be made of the same material as the color filter.

According to another feature of the present invention, the dummy color filter and the blue color filter may have a mesh shape, and the red color filter and the green color filter may have an island shape.

According to still another feature of the present invention, a planarization layer disposed to cover the dummy color filter, the red color filter, the green color filter and the blue color filter, and the planarization layer are disposed on the planarization layer and are disposed between the adjacent gate wirings and the common wirings. It may further include a column spacer disposed to overlap the space.

According to another feature of the present invention, the column spacer may be made of a light blocking material.

A display device according to another exemplary embodiment includes a substrate on which a plurality of pixels are disposed, a gate line and a common line extending in a first direction at a boundary between the plurality of pixels, a gate electrode extending from the gate line, and an active on the gate electrode a thin film transistor including a layer and a source electrode and a drain electrode on the active layer, an auxiliary active layer disposed to cover the gate wiring and the common wiring at the boundary between the plurality of pixels, and a first so as to cover the boundary between the plurality of pixels It includes more color filters extending in the direction.

According to another feature of the present invention, at the boundary between the plurality of pixels, the second direction is disposed in a direction different from the first direction, and the first data line of one side of one pixel and the second side of the other side of one pixel are arranged in a second direction. It may further include a data line.

According to another feature of the present invention, the auxiliary active layer and the active layer are spaced apart spaces between two pixels extending in the second direction among the plurality of pixels and fill the space between the first data line and the second data line. can be placed.

According to another feature of the present invention, the auxiliary active layer may be spaced apart from the first data line and the second data line.

According to another aspect of the present invention, the active layer is electrically connected to the first data line, the auxiliary active layer is connected to the active layer and electrically connected to the first data line, and the auxiliary active layer is connected to the second data line and the second data line. can be spaced apart.

According to another feature of the present invention, the auxiliary active layer is disposed on the same layer as the active layer of the thin film transistor, and may be made of the same material.

According to another feature of the present invention, a blue color filter disposed in some of the plurality of pixels is further included, wherein the blue dummy color filter is made of the same material as the blue color filter, so that the blue dummy color filter and the blue color filter are made of the same material. The filter may have a mesh shape.

According to still another feature of the present invention, a planarization layer disposed to cover the blue color filter and the blue dummy color filter may further include a black column spacer disposed at a boundary between the plurality of pixels on the planarization layer.

According to another feature of the present invention, the sum of the wavelength ranges of the light respectively absorbed by the blue dummy color filter and the auxiliary active layer may be the wavelength range of the visible light region.

Although embodiments of the present invention have been described in more detail with reference to the accompanying drawings, the present invention is not necessarily limited to these embodiments, and various modifications may be made within the scope without departing from the technical spirit of the present invention. . Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. The protection scope of the present invention should be construed by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

100, 200: display device
A/A: display area
N/A: non-display area
GL: gate wiring
CL: common wiring
DL: data wiring
DL1: first data line
DL2: second data line
PX: pixel
CS : column spacer
R: red color filter
G: Green color filter
B: Blue color filter
101: lower substrate
102: buffer layer
103: gate insulating layer
104: passivation layer
105: planarization layer
110: thin film transistor
111: gate electrode
112: active layer
113: source electrode
114: drain electrode
120: capacitor
121: first capacitor electrode
122: second capacitor electrode
130, 230: auxiliary active layer
140: dummy color filter
151: pixel electrode
161: upper substrate

Claims (19)

a substrate having a plurality of pixels including a light emitting area defined thereon;
a plurality of gate wirings and a plurality of common wirings extending in a row direction from a boundary between the plurality of pixels;
a plurality of thin film transistors connected to the plurality of gate lines;
an auxiliary active layer overlapping the gate line and the common line; and
a plurality of dummy color filters overlapping the plurality of thin film transistors, the plurality of gate wires, the plurality of common wires, and the auxiliary active layer;
The plurality of thin film transistors include a gate electrode connected to the gate wiring, an active layer on the gate electrode, and source and drain electrodes on the active layer,
The auxiliary active layer extends from the active layer to form an integral body with the active layer,
The auxiliary active layer and the active layer are disposed to cover the gate line and the common line while filling a space between two pixels extending in a direction perpendicular to the row direction among the plurality of pixels. . delete delete delete According to claim 1,
The dummy color filter is disposed in a space between two pixels adjacent in a column direction among the plurality of pixels. 6. The method of claim 5,
The entire area of the auxiliary active layer overlaps the dummy color filter. According to claim 1,
a passivation layer covering the thin film transistor; and
Further comprising a red color filter, a green color filter, and a blue color filter disposed on the passivation layer in each of the plurality of pixels,
and the dummy color filter is made of the same material as the blue color filter. 8. The method of claim 7,
The dummy color filter and the blue color filter form a mesh shape,
The red color filter and the green color filter have an island shape. 8. The method of claim 7,
a planarization layer disposed to cover the dummy color filter, the red color filter, the green color filter, and the blue color filter; and
and a column spacer disposed on the planarization layer and disposed to overlap a space between the gate line and the common line adjacent to each other. 10. The method of claim 9,
The column spacer is made of a light blocking material. a substrate on which a plurality of pixels are disposed;
a gate wiring and a common wiring extending in a first direction at a boundary between the plurality of pixels;
a thin film transistor including a gate electrode extending from the gate wiring, an active layer on the gate electrode, and source and drain electrodes on the active layer;
an auxiliary active layer disposed to cover the gate line and the common line at a boundary between the plurality of pixels; and
a dummy color filter extending in the first direction to cover a boundary between the plurality of pixels;
The auxiliary active layer extends from the active layer to form an integral body with the active layer,
the auxiliary active layer and the active layer are disposed to cover the gate wiring and the common wiring while filling a space between two pixels extending in a second direction different from the first direction among the plurality of pixels Device. 12. The method of claim 11,
The display device of claim 1, further comprising: a first data line on one side of one pixel and a second data line on the other side of the one pixel, the first data line being disposed in the second direction at a boundary between the plurality of pixels. delete 13. The method of claim 12,
The auxiliary active layer is spaced apart from the first data line and the second data line. 13. The method of claim 12,
the active layer is electrically connected to the first data line;
the auxiliary active layer is connected to the active layer and electrically connected to the first data line;
and the auxiliary active layer is spaced apart from the second data line. delete 12. The method of claim 11,
Further comprising a blue color filter disposed on some of the plurality of pixels of the plurality of pixels,
The dummy color filter is made of the same material as the blue color filter,
The dummy color filter and the blue color filter form a mesh shape. 18. The method of claim 17,
a planarization layer disposed to cover the blue color filter and the dummy color filter; and
and a black column spacer disposed at a boundary between the plurality of pixels on the planarization layer. 12. The method of claim 11,
The sum of the wavelength ranges of the light respectively absorbed by the dummy color filter and the auxiliary active layer is a wavelength range of a visible light region.

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