KR102470103B1 - Touch display apparatus - Google Patents

Abstract

According to an embodiment of the present invention, a touch-integrated display device having an improved viewing angle using a thin black matrix layer is provided. A substrate in which a plurality of sub-pixel areas and a black matrix area are defined is provided, and a first light absorption layer is disposed in the black matrix area. The touch sensing layer is disposed on the first light absorption layer, and the touch wiring electrode is disposed on the touch sensing layer and disposed in the black matrix area. A cell gap of a touch-integrated display device can be reduced by using a black matrix layer using a thin film light absorption layer, and thus a viewing angle can be improved.

Description

Touch integrated display device {TOUCH DISPLAY APPARATUS}

The present invention relates to a touch-integrated display device, and more particularly, to providing a touch-integrated display device that is slimmed using a black matrix of a multi-layered thin film and has an improved viewing angle.

A touch-integrated display device is a display device that senses a user's touch of one or more points on a display screen and a user's touch-related motion related thereto, and includes personal portable devices such as smartphones and tablet PCs as well as display devices in public facilities and smart TVs. It is widely used in large display devices.

A touch-integrated display device may be classified into a resistive type, a capacitive type, an infrared type (IR) type, etc. according to an operation method, and the capacitive type is commonly used in recent years.

A capacitive touch-integrated display device basically includes a first electrode extending in a first lateral direction and a second lateral direction using a transparent conductive material such as indium tin oxide (ITO) or indium zinc oxide (IZO). It includes a second electrode, and the capacitance of the first electrode and the second electrode is changed due to physical contact with the user's display device, and the user's touch position is detected through the capacitance change of the first electrode and the second electrode. will do

In addition, the touch-integrated display device includes a plurality of pixels for displaying information to a user. A liquid crystal display device including a backlight and a liquid crystal layer and driving a liquid crystal layer corresponding to a pixel by a driving element and an organic light emitting layer for each pixel. An organic light emitting display device or the like that includes a light emitting diode and emits light from individual pixels by a driving element is widely used.

In the case of an organic light emitting display device, color expression is performed by including a color filter layer. As a color expression method of the organic light emitting display device, a method of varying the wavelength of light emitted from the organic light emitting layer for each pixel or a method of using a white organic light emitting layer and a color filter is used.

A black matrix layer is disposed between a plurality of pixels included in the touch-integrated display device to prevent color mixing between pixels.

In the case of a touch-integrated display device in which the wavelength of light emitted by the organic light emitting layer is different for each pixel, color mixing between pixels is prevented and a gap between the upper substrate including the black matrix layer and the lower substrate including the organic light emitting element is ensured to secure a viewing angle. It is important to keep an appropriate distance.

[Related technical literature]

[Patent Literature]

1. Color filter array substrate, liquid crystal display including the same, and manufacturing method thereof (Patent Application No. 10-2010-0028349)

In a touch-integrated display device, a touch function is realized by including a touch sensing layer and a touch wiring electrode in a substrate including a black matrix layer.

In the case of an organic light emitting display device, it is possible to secure a wide viewing angle by minimizing the distance between the black matrix layer and the organic light emitting layer.

However, in recent years, when a display device including a black matrix layer is implemented to implement a thin-film flexible display device, there is a problem in improving the viewing angle because the thickness of the black matrix layer cannot be made very thin. Accordingly, the inventors of the present invention invented a touch-integrated display device including a black matrix layer composed of a light absorption layer of a thin film.

The problem to be solved according to an embodiment of the present invention is to reduce the wiring width of the touch wiring electrode by arranging a black matrix layer having a multi-layer structure including a thin film light absorption layer and composed of a touch sensing layer and a metal thin film electrode, and including a touch sensing layer. An object of the present invention is to provide a touch-integrated display device having an improved viewing angle by minimizing a distance between a substrate and a substrate including an organic light emitting layer.

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

According to an embodiment of the present invention, a touch-integrated display device having an improved viewing angle using a thin black matrix layer is provided. A substrate in which a plurality of sub-pixel areas and a black matrix area are defined is provided, and a first light absorption layer is disposed in the black matrix area. The touch sensing layer is disposed on the first light absorption layer, and the touch wiring electrode is disposed on the touch sensing layer and disposed in the black matrix area. A cell gap of a touch-integrated display device can be reduced by using a black matrix layer using a thin film light absorption layer, and thus a viewing angle can be improved.

According to another feature of the present invention, the touch-integrated display device further includes a second light absorption layer disposed on the touch sensing layer and corresponding to the first light absorption layer. According to another feature of the present invention, the touch The integrated display device further includes a color filter layer disposed on the substrate, and the color filter layer includes at least one color filter selected from a red color filter, a green color filter, and a blue color filter.

According to another feature of the present invention, the color filter layer is characterized in that it includes at least two color filters selected from red color filters, green color filters and blue color filters overlapping each other in the black matrix area.

According to another feature of the present invention, the touch-integrated display device is characterized in that it further comprises an auxiliary adhesive layer disposed on the color filter layer.

According to another feature of the present invention, the touch-integrated display device is characterized by further comprising a lower substrate facing the substrate and including a plurality of driving elements and organic light emitting elements.

According to another embodiment of the present invention, a touch-integrated display device having an improved viewing angle is provided by using a thin black matrix layer. A plurality of touch sensing regions including a plurality of subpixel regions and a black matrix region in the form of a mesh are defined on the substrate. A plurality of touch sensing layers are disposed in the touch sensing area. The first light absorption layer and the second light absorption layer are disposed in the black matrix area. A touch wiring electrode is disposed in the black matrix area. The first light absorption layer, the touch sensing layer, and the second light absorption layer overlap in the black matrix area to define a black matrix layer. Through the black matrix layer using the thin film light absorption layer from the first light absorption layer to the second light absorption layer, the cell gap of the touch integrated display device can be reduced, thereby improving the viewing angle.

According to another feature of the present invention, the touch-integrated display device includes a plurality of color filter layers disposed on a substrate, and the color filter layer is at least one color filter selected from a red color filter, a blue color filter, and a green color filter. do.

According to another feature of the present invention, the color filter layer is characterized in that it includes at least two color filters selected from among red color filters, blue color filters and green color filters in the black matrix area.

According to another feature of the present invention, the black matrix layer overlaps the first light absorption layer, the touch sensing layer, and the second light absorption layer in that order, and further includes a touch wiring electrode on the black matrix.

According to another feature of the present invention, the touch-integrated display device is characterized in that it further comprises an auxiliary adhesive layer disposed on the color filter layer.

According to an embodiment of the present invention, by providing a black matrix layer composed of a thin film light absorption layer, there is an effect of improving the viewing angle by reducing the cell gap.

In addition, the thin film light absorbing layer has high pattern accuracy, so that manufacturing costs can be reduced by reducing defects by improving the adhesion margin of the substrate.

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

Since the content of the invention described in the problem to be solved, the means for solving the problem, and the effect above does not specify the essential features of the claim, the scope of the claim is not limited by the matters described in the content of the invention.

Figure 1a is a schematic plan view for explaining a touch-integrated display device including a light absorption layer according to an embodiment of the present invention.
FIG. 1B is an enlarged view of region X of FIG. 1B and is a schematic cross-sectional view illustrating the arrangement of a touch wiring electrode, a touch sensing layer, and a light absorbing layer according to an embodiment of the present invention.
Figure 2a is a schematic cross-sectional view taken along line A of Figure 1b for explaining the arrangement of the light absorption layer according to an embodiment of the present invention.
FIG. 2B is a schematic cross-sectional view taken along line B of FIG. 1B for explaining the arrangement of a light absorbing layer according to an embodiment of the present invention.
Figure 2c is a schematic cross-sectional view of C of Figure 1b according to one embodiment of the present invention.
3 is a schematic cross-sectional view for explaining a thin film black matrix layer including a light absorption layer according to an embodiment of the present invention.
4A is a schematic cross-sectional view for explaining a light absorption layer constituting a thin film black matrix layer according to an embodiment of the present invention.
4B is a schematic cross-sectional view for explaining various configurations of a light absorption layer constituting a thin film black matrix layer according to an embodiment of the present invention.

Advantages and features of the present invention, and methods of achieving them, will become clear with reference to the detailed description of the following embodiments taken in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms, only these embodiments make the disclosure of the present invention complete, and common knowledge in the art to which the present invention belongs. It is provided to fully inform the holder of the scope of the invention, and the present invention is only defined by the scope of the claims.

The shapes, sizes, ratios, angles, numbers, etc. disclosed in the drawings for explaining the embodiments of the present invention are illustrative, so the present invention is not limited to the details shown. Like reference numbers designate like elements throughout the specification. In addition, in describing the present invention, if it is determined that a detailed description of related known technologies may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. When 'includes', 'has', 'consists of', etc. mentioned in this specification is used, other parts may be added unless 'only' is used. In the case where a component is expressed in the singular, the case including the plural is included unless otherwise explicitly stated.

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

In the case of a description of a positional relationship, for example, 'on top of', 'on top of', 'at the bottom of', 'next to', etc. Or, unless 'directly' is used, one or more other parts may be located between the two parts.

Although 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. Therefore, the first component mentioned below may also be the second component within the technical spirit of the present invention.

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

Hereinafter, various configurations of a touch-integrated display device including a thin film light absorption layer used for forming a black matrix layer according to an embodiment of the present invention will be described.

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

Figure 1a is a schematic plan view for explaining a touch-integrated display device including a light absorption layer according to an embodiment of the present invention.

Referring to FIG. 1A , in the touch-integrated display device 100 , a plurality of first touch sensing areas 111 and a plurality of second touch sensing areas 112 are defined on a substrate 110 .

The touch sensing signals detected by the first touch sensing area 111 and the second touch sensing area 112 are transferred to the circuit unit 114 through the circuit wiring electrode 113 .

The first touch sensing area 111 is connected in the vertical direction and the second touch sensing area 112 is connected in the horizontal direction, so the coordinates of the user's touch on the touch-integrated display device 100 are calculated in the circuit unit 114. .

Various driving methods for touch sensing are possible. Taking time-division driving as an example, a voltage is applied to one first touch sensing area 111 and a voltage is sequentially applied to a plurality of second touch sensing areas 112. In this way, voltage is sequentially applied to the first touch sensing region 111 . If the location of the constant voltage changed due to the user's touch is calculated in the circuit unit 114 by repeating the above method, the user's touch point can be calculated.

Detailed configurations of the first touch sensing area 111 and the second touch sensing area 112 will be described in detail below.

FIG. 1B is an enlarged view of region X of FIG. 1B and is a schematic cross-sectional view illustrating the arrangement of a touch wiring electrode, a touch sensing layer, and a light absorbing layer according to an embodiment of the present invention.

Referring to FIG. 1B , in the first touch region 111, the first touch sensing layer 131 connected to the first touch wiring electrode 121 is disposed, and in the second touch region 112, the second touch wiring electrode ( 122) and the second touch sensing layer 132 are disposed.

The touch sensing layer 130 defined as the first touch sensing layer 131 and the second touch sensing layer 132 is divided into a plurality of segments to reduce cracks that may occur in a flexible environment.

The first touch sensing area 111 extends in the vertical direction and is connected by the first touch wiring electrode 121, and the second touch sensing area 112 extends in the horizontal direction and is connected to the first touch wiring electrode 121. separated from the intersection with

The separated second touch sensing area 112 further includes an insulating film (not shown) on the first touch wiring electrode 121, and the connection electrode 124 connecting the second touch wiring electrode 122 and the first touch The wiring electrode 121 is insulated.

The connection electrode 124 is connected at the electrode connection part 123 of the first touch wire electrode 122 so that the second touch area 112 is connected in the horizontal direction.

The touch wire electrode 120 is arranged in a mesh shape, and a space opened in the mesh shape may have the size of a subpixel (SP) or may correspond to an integer multiple of the subpixel (SP).

Figure 2a is a schematic cross-sectional view taken along line A of Figure 1b for explaining the arrangement of the light absorption layer according to an embodiment of the present invention.

Referring to FIG. 2A , a color filter layer 240 is disposed on a substrate 210 in which a sub-pixel area SP and a black matrix area BM are defined.

The color filter layer 240 may be a color filter selected from among red, blue, green, and yellow color filters.

The color filter layer 240 may have a multilayer structure including at least two layers in the black matrix area BM.

When the color filter layer 240 on the black matrix area BM has a multilayer structure, external visibility may be improved due to increased light transmittance for external light.

A first light absorption layer 251 is disposed on the color filter layer 240 . The first light absorbing layer 251 is made of Mo (Molybdenum) and may further include an auxiliary adhesion layer 241 for increasing adhesion with the color filter layer 240. SiNx and the like can be used.

A touch sensing layer 230 is disposed on the color filter layer 240 . The touch sensing layer 230 is disposed to cover the sub-pixel area SP and the black matrix area BM.

A first light absorption layer 251 is disposed on the black matrix area (BM), a second light absorption layer 252 is disposed on the touch sensing layer 230, and a touch wiring electrode is disposed on the second light absorption layer 252. (253) is placed.

The second light absorbing layer 252 may be made of the same material as the first light absorbing layer 252, and the touch wire electrode 253 may be made of a metal having low electrical resistance such as copper (Cu).

The amount of external light incident on the black matrix area BM is reduced by the color filter layer 240 , and the amount of external light is reduced while passing through the first light absorbing layer 251 . In addition, external light transmitted through the second light absorbing layer 252 may be reflected by the touch wiring electrode 253, but is trapped by the first light absorbing layer 251 and the second light absorbing layer 252 and interferes with light wavelengths. As a result, the amount of light that is offset and reflected to the outside is greatly reduced.

As a result, the black matrix area BM can replace the black matrix with the structure of the first light absorption layer 251 , the touch sensing layer 230 and the second light absorption layer 252 .

FIG. 2B is a schematic cross-sectional view taken along line B of FIG. 1B for explaining the arrangement of a light absorbing layer according to an embodiment of the present invention.

Descriptions of the same components as those of FIG. 2A will be omitted.

Referring to a configuration different from that of FIG. 2A with reference to FIG. 2B , the touch sensing layer 230 of FIG. 2A is not disposed in the sub-pixel area SP including the black matrix area BM.

The black matrix area BM may include a stacked structure of a first light absorbing layer 251, a second light absorbing layer 252, and a touch wiring electrode 253. In this case, the first light absorbing layer 251 for external light ) and the second light absorbing layer 252, and the external light reflected by the touch wire electrode 253 can be greatly reduced, so the black matrix area BM of FIG. 2B is the first light absorbing layer 251. ), the structure of the second light absorption layer 252 and the touch wiring electrode 253 can replace the black matrix.

Figure 2c is a schematic cross-sectional view of C of Figure 1b according to one embodiment of the present invention.

Referring to FIG. 2C , a color filter layer 240 is disposed on a substrate 210 and an auxiliary adhesion layer 241 is disposed.

Referring to FIGS. 1B and 2A to 2B , the color filter layer 240 is disposed on the substrate 210 in which the sub-pixel area SP and the black matrix area BM are defined.

The color filter layer 240 is a color filter selected from among color filters such as red, blue, green, and yellow, and in the black matrix area (BM), two selected from among red, blue, green, and yellow color filters selected as the color filter layer 240. By arranging the above color filters to overlap, it is possible to minimize visibility deterioration due to reflection of external light.

3 is a schematic cross-sectional view for explaining a thin film black matrix layer including a light absorption layer according to an embodiment of the present invention.

Referring to FIG. 3 , a color filter layer 340 is disposed on a substrate 310 in which a sub-pixel area SP and a black matrix area BM are defined.

The color filter layer 340 may be a color filter selected from among red color filters, blue color filters, and green color filters for expressing various colors, and the color filter layer 340 corresponding to the black matrix area BM minimizes reflection of external light. It may be a multi-layered color filter layer 340 composed of two or more color filters selected from among red color filters, blue color filters, and green color filters.

A first light absorption layer 351 is disposed on the color filter layer 340 corresponding to the black matrix area BM. In addition, the touch sensing layer 330 is disposed on the sub-pixel area SP, and the touch sensing layer 330 extends to cover the first light absorbing layer 351 disposed in the black matrix area BM. .

A touch wiring electrode 353 is disposed on the touch sensing layer 330 of the black matrix area BM.

The amount of external light transmitted through the substrate 310 is reduced by the color filter layer 340 and the first light absorbing layer 351, but some of the external light passes through the first light absorbing layer 351 and the touch sensing layer 330. It is reflected from the touch wiring electrode 353. However, the amount of light is reduced due to destructive interference due to the optical phase difference between the first light absorbing layer 351 and the touch wire electrode 353, so that the reflectance of external light can be further lowered.

4A is a schematic cross-sectional view for explaining a light absorption layer constituting a thin film black matrix layer according to an embodiment of the present invention.

Referring to FIG. 4A , a substrate 410 including a thin film black matrix 450 is provided.

The thin film black matrix 450 may include a first light absorbing layer 451 , a touch sensing layer 430 , a second light absorbing layer 452 , and a touch wiring electrode 453 .

The first light absorption layer 451 is made of molybdenum (Mo) and may be disposed with a thickness of 4 nm to 6 nm, and the touch sensing layer is a transparent conductive material such as ITO or IZO or a material such as SiO ₂ , SiNx, Al ₂ O ₃ It can be arranged with a thickness of 35 ~ 45nm. The second light absorbing layer 452 may be formed of the same material as the first light absorbing layer 451 and have a thickness of 4 to 6 nm. The touch wiring electrode 453 is a metal material having low electrical resistance, such as Cu, and may be disposed to a thickness of 200 nm.

A color filter layer 440 may be included between the substrate 410 and the thin film black matrix 450. In this case, an auxiliary adhesion layer 441 for bonding the thin film black matrix 450 to the color filter layer 440 is provided. can include more.

4B is a schematic cross-sectional view for explaining various configurations of a light absorption layer constituting a thin film black matrix layer according to an embodiment of the present invention.

Referring to FIG. 4B , a thin film black matrix layer 450 is disposed on a substrate 410 .

The thin film black matrix layer 450 may include a first light absorption layer 451 , a touch sensing layer 430 and a touch wiring electrode 453 . In addition, a color filter layer 440 may be further included between the substrate 410 and the thin film black matrix layer 450, and in this case, the thin film black matrix layer 450 and color filter layer 441 are used to Adhesion between the filter layers 440 may be improved.

Although the 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 may be variously modified and implemented 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 idea of the present invention, but to explain, and the scope of the technical idea 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 according to the claims, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

100: touch integrated display device
111: first touch sensing area
112: second touch sensing area
113: circuit wiring electrode
114: circuit part
120, 353, 453: touch wiring electrode
130, 230, 330, 430: touch sensing layer
240, 340, 440: color filter layer
450: thin film black matrix layer
251, 351, 451: first light absorption layer
252, 352, 452: second light absorption layer

Claims (11)

an organic light emitting device including an organic light emitting layer;
a driving element that emits light from the organic light emitting element;
a touch wiring electrode disposed on the organic light emitting element and the driving element;
a light absorbing layer disposed on the touch wiring electrode; and
An organic light emitting display device comprising a color filter layer disposed on the light absorption layer. According to claim 1,
The light absorbing layer overlaps at least two color filter layers, the organic light emitting display device. According to claim 1,
The organic light emitting display device further comprises an auxiliary adhesion layer disposed between the color filter layer and the light absorption layer. According to claim 1,
The light absorbing layer includes a first light absorbing layer and a second light absorbing layer disposed on top of the first light absorbing layer, the organic light emitting display device. According to claim 4,
The first light absorbing layer and the second light absorbing layer are made of the same material, the organic light emitting display device. According to claim 4,
The organic light emitting display device further comprises a touch sensing layer disposed between the first light absorbing layer and the touch wiring electrode. According to claim 6,
The touch sensing layer is disposed to cover the first light absorption layer, the organic light emitting display device. According to claim 1,
The organic light emitting display device wherein the touch wiring electrodes are disposed in a mesh shape. According to claim 1,
An organic light emitting display device further comprising an insulating film disposed on the touch wiring electrode. According to claim 1,
an upper substrate on which the light absorption layer, the touch wiring electrode, and the color filter layer are disposed; and
The organic light emitting display device further comprises a lower substrate on which the driving element and the organic light emitting element are disposed and facing the upper substrate. According to claim 10,
The color filter layer, the light absorption layer, and the touch wiring electrode are sequentially disposed on the upper substrate,
The upper substrate and the lower substrate are bonded together so that the touch wiring electrode and the organic light emitting layer maintain a predetermined distance.

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