Touch display assembly and method for manufacturing same

A touch display assembly and a method for manufacturing the same are provided. The touch display assembly includes a display device, a first organic insulating layer, a second organic insulating layer, a first touch sensing electrode, a second touch sensing electrode, and a protective layer. The first touch sensing electrode and the second touch sensing electrode are both disposed on the second organic insulating layer. A bridge portion of the first touch sensing electrode passes through the second organic insulating layer and is overlapped by the second touch sensing electrode. In the touch display assembly, film layers are prevented from separating from each other after being bent multiple times.

FIELD OF INVENTION

The present invention relates to a technical field in displays, and particularly to a touch display assembly and a method for manufacturing same.

BACKGROUND OF DISCLOSURE

A conventional flexible touch display panel includes several layers of devices or films, and the devices and films are stacked together.

After undergoing several times of bending, stress on some of the devices or the films in the conventional flexible touch display panel becomes great, thereby causing some of the devices or films to be separated from other devices or films, and affecting touch performance of the conventional flexible touch display panel.

Therefore, it is necessary to provide a new technical solution to solve the above technical problem.

SUMMARY OF INVENTION

An object of the present disclosure is to provide a touch display assembly and a method for manufacturing same, which avoids separation of some of devices or films in the touch display assembly from other devices or films after undergoing many times of bending.

In order to solve the above problem, the technical solution of the present disclosure is as follows:

A touch display assembly, comprising:

a display device;

a touch device disposed on the display device, and including:

a first organic insulating layer disposed on the display device;

a second organic insulating layer disposed on the first organic insulating layer;

a first touch sensing electrode;

a second touch sensing electrode; and

a protective layer;

wherein the first touch sensing electrode and the second touch sensing electrode are both disposed on the second organic insulating layer; and in a direction perpendicular to a plane which the display device faces, a bridge portion of the first touch sensing electrode passes through the second organic insulating layer and is overlapped by the second touch sensing electrode;

wherein the first organic insulating layer is formed by cleaning a surface of the display device, disposing a first organic insulating material on the surface of the display device, curing the first organic insulating material, and ashing the cured first organic insulating material; and

wherein the second organic insulating layer is formed by cleaning a surface of the bridge portion of the first touch sensing electrode and a surface of a portion of the first organic insulating layer which is not covered by the bridge portion, disposing a second organic insulating material on the surface of the bridge portion of the first touch sensing electrode and the surface of the portion of the first organic insulating layer which is not covered by the bridge portion, curing the second organic insulating material, and ashing the cured second organic insulating material.

In the touch display assembly, material of any one of the first organic insulating layer, the second organic insulating layer, and the protective layer is photoresist material, resin material, or polyimide material.

In the touch display assembly, at least a portion of the bridge portion is disposed on the first organic insulating layer.

In the touch display assembly, at a place where the bridge portion of the first touch sensing electrode is overlapped by the second touch sensing electrode, the second organic insulating layer is disposed between the bridge portion and the second touch sensing electrode.

A touch display assembly, comprising:

a display device;

a touch device disposed on the display device, and including:

a first organic insulating layer disposed on the display device;

a second organic insulating layer disposed on the first organic insulating layer;

a first touch sensing electrode;

a second touch sensing electrode; and

a protective layer;

wherein the first touch sensing electrode and the second touch sensing electrode are both disposed on the second organic insulating layer; and in a direction perpendicular to a plane which the display device faces, a bridge portion of the first touch sensing electrode passes through the second organic insulating layer and is overlapped by the second touch sensing electrode.

In the touch display assembly, material of any one of the first organic insulating layer, the second organic insulating layer, and the protective layer is photoresist material, resin material, or polyimide material.

In the touch display assembly, at least a portion of the bridge portion is disposed on the first organic insulating layer.

In the touch display assembly, at a place where the bridge portion of the first touch sensing electrode is overlapped by the second touch sensing electrode, the second organic insulating layer is disposed between the bridge portion and the second touch sensing electrode.

In the touch display assembly, the protective layer is disposed on the first touch sensing electrode and the second touch sensing electrode, and disposed on a portion of the second organic insulating layer which is not covered by the first touch sensing electrode and the second touch sensing electrode.

In the touch display assembly, the first organic insulating layer is formed by cleaning a surface of the display device, disposing a first organic insulating material on the surface of the display device, curing the first organic insulating material, and ashing the cured first organic insulating material.

In the touch display assembly, the second organic insulating layer is formed by cleaning a surface of the bridge portion of the first touch sensing electrode and a surface of a portion of the first organic insulating layer which is not covered by the bridge portion, disposing a second organic insulating material on the surface of the bridge portion of the first touch sensing electrode and the surface of the portion of the first organic insulating layer which is not covered by the bridge portion, curing the second organic insulating material, and ashing the cured second organic insulating material.

In the touch display assembly, an array of protrusions and/or an array of depressions are disposed on a surface of an encapsulation layer of the display device, the array of protrusions includes at least two protrusions, the array of depressions includes at least two depressions, the protrusions and/or the depressions are configured to improve a coupling between the first organic insulating layer and the encapsulating layer, and at least a part of the first organic insulating layer is disposed in gaps between two of the adjacent protrusions or in the depressions.

A method for manufacturing a touch display assembly, comprising:

a step A of forming a display device; a step B of disposing a first organic insulating layer on the display device;

a step C of disposing a second organic insulating layer on the first organic insulating layer;

a step D of disposing a first touch sensing electrode and a second touch sensing electrode on the second organic insulating layer, wherein in a direction perpendicular to a plane which the display device faces, a bridge portion of the first touch sensing electrode passes through the second organic insulating layer and is overlapped by the second touch sensing electrode; and

a step E of disposing a protective layer on the first touch sensing electrode, the second touch sensing electrode, and a portion of the second organic insulating layer which is not covered by the first touch sensing electrode and the second touch sensing electrode.

In the method for manufacturing the touch display assembly, material of any one of the first organic insulating layer, the second organic insulating layer, and the protective layer is photoresist material, resin material, or polyimide material.

In the method for manufacturing the touch display assembly, the step B comprises:

a step b1 of cleaning a surface of the display device;

a step b2 of disposing a first organic insulating material on the surface of the display device;

a step b3 of curing the first organic insulating material; and

a step b4 of ashing the cured first organic insulating material to form the first organic insulating layer.

In the method for manufacturing the touch display assembly, the step C comprises:

a step c1 of cleaning a surface of the bridge portion of the first touch sensing electrode and a surface of a portion of the first organic insulating layer which is not covered by the bridge portion;

a step c2 of disposing a second organic insulating material on the surface of the bridge portion of the first touch sensing electrode and the surface of the portion of the first organic insulating layer which is not covered by the bridge portion;

a step c3 of curing the second organic insulating material; and

a step c4 of ashing the cured second organic insulating material to form the second organic insulating layer.

In the method for manufacturing the touch display assembly, the step E comprises:

a step e1 of disposing an organic material on the first touch sensing electrode, the second touch sensing electrode, and a portion of the second organic insulating layer which is not covered by the first touch sensing electrode and the second touch sensing electrode;

a step e2 of performing yellow light irradiation on the organic material;

a step e3 of baking the organic material after performing the yellow light irradiation;

a step e4 of ashing the baked organic material to form the protective layer.

In the method for manufacturing the touch display assembly, the step A comprises:

a step a1 of disposing a thin film transistor device layer on the substrate;

a step a2 of disposing a light emitting device layer on the thin film transistor device layer; and

a step a3 of disposing an encapsulation layer on the light emitting device layer.

In the method for manufacturing the touch display assembly, the step B includes a step of disposing a first organic insulating layer on the encapsulation layer of the display device; and after the step a3, the method for manufacturing the touch display assembly further includes a step H of disposing an array of protrusions and/or an array of depressions on a surface of the encapsulation layer of the display device,

wherein the array of protrusions includes at least two protrusions, the array of depressions includes at least two depressions, and the protrusions and/or the depressions are configured to improve a coupling between the first organic insulating layer and the encapsulating layer.

In the method for manufacturing the touch display assembly, material of any one of the first organic insulating layer, the second organic insulating layer, and the protective layer is photoresist material, resin material, or polyimide material.

Compared with the prior art, by stacking the first organic insulating layer, the first touch sensing electrode, the second organic insulating layer, the second touch sensing electrode, and the protective layer together, the touch device of the touch display assembly is formed. Therefore, after the touch display assembly undergoes many times of bending, separation of some of devices or films in the touch display assembly from other devices or films is avoided, for facilitating ensuring touch performance of the touch display assembly.

In order to make the above description of the present disclosure more comprehensible, the preferred embodiments are described in detail below with reference to the accompanying drawings.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

The term “embodiment” as used in this specification means serving as an example, implementation, or illustration. Furthermore, the articles “a” or “an” as used in the specification and the appended claims may generally be construed to mean “one or more” unless it is clearly specified to be the singular form in the context.

Referring toFIG. 1, which is a schematic diagram of a touch display assembly of the present disclosure.

The touch display assembly of the present disclosure includes a display device and a touch device, and the touch device is disposed on the display device. The display device of the present disclosure is suitable for a thin film transistor liquid crystal display (TFT-LCD), an organic light emitting diode (OLED), and the like.

The touch device includes a first organic insulating layer105, a first touch sensing electrode106, a second organic insulating layer107, a second touch sensing electrode108, and a protective layer109.

The display device includes a substrate101, a thin film transistor device layer102, a light emitting device layer103, and an encapsulation layer104. The thin film transistor device layer102is disposed on the substrate101. The light emitting device layer103is disposed on the thin film transistor device layer102. The encapsulation layer104is disposed on the light emitting device layer103.

The first organic insulating layer105is disposed on the display device. Specifically, the first organic insulating layer105is disposed on the encapsulation layer104of the display device.

The second organic insulating layer107is disposed on the first organic insulating layer105. Specifically, the second organic insulating layer107is disposed on a bridge portion1061of the first touch sensing electrode106and a portion of the first organic insulating layer105which is not covered by the bridge portion1061.

The first organic insulating layer105is formed by cleaning a surface of the display device (the encapsulation layer104), disposing a first organic insulating material on the surface of the display device (the encapsulation layer104), curing the first organic insulating material, and ashing the cured first organic insulating material.

An array of protrusions and/or an array of depressions are disposed on a surface of the encapsulation layer104of the display device. The array of protrusions includes at least two protrusions, the array of depressions includes at least two depressions, the protrusions and/or the depressions are configured to improve a coupling between the first organic insulating layer105and the encapsulating layer104, and at least a part of the first organic insulating layer is disposed in gaps between two of the adjacent protrusions or in the depressions.

The first touch sensing electrode106and the second touch sensing electrode108are both disposed on the second organic insulating layer107. In a direction perpendicular to a plane which the display device faces, the bridge portion1061of the first touch sensing electrode106passes through the second organic insulating layer108and is overlapped by the second touch sensing electrode108.

At least a portion of the bridge portion1061of the first touch sensing electrode106is disposed on the first organic insulating layer105.

The bridge portion1061of the first touch sensing electrode106is formed by cleaning a surface of the first organic insulating layer105, sequentially disposing a first metal material, a second metal material, and a third metal material on the surface of the first organic insulating layer105, then performing a first photomask process on a combination of the first metal material, the second metal material, and the third metal material, baking the combination of the first metal material, the second metal material, and the third metal material which were subject to the first photomask process, performing a dry etching process on the baked combination of the first metal material, the second metal material, and the third metal material, and removing a residue of the dry etched combination of the first metal material, the second metal material, and the third metal material. The first metal material may be, for example, titanium, the second metallic material may be, for example, aluminum, and the third metallic material may be, for example, titanium.

At a place where the bridge portion1061of the first touch sensing electrode106is overlapped by the second touch sensing electrode108, the second organic insulating layer107is disposed between the bridge portion1061and the second touch sensing electrode108.

The second organic insulating layer107is disposed on the bridge portion1061of the first touch sensing electrode106and the portion of the first organic insulating layer105which is not covered by the bridge portion1061.

The second organic insulating layer107is formed by cleaning a surface of the bridge portion1061of the first touch sensing electrode106and a surface of the portion of the first organic insulating layer105which is not covered by the bridge portion1061, disposing a second organic insulating material on the surface of the bridge portion1061of the first touch sensing electrode106and the surface of the portion of the first organic insulating layer105which is not covered by the bridge portion1061, curing the second organic insulating material, and ashing the cured second organic insulating material.

The second touch sensing electrode108is formed by cleaning a surface of the second organic insulating layer107, sequentially disposing a fourth metal material, a fifth metal material and, a sixth metal material on the surface of the second organic insulating layer107, then performing a second photomask process on a combination of the fourth metal material, the fifth metal material, and the sixth metal material, baking the combination of the fourth metal material, the fifth metal material, and the sixth metal material which were subject to the second photomask process, performing the dry etching process on the baked combination of the fourth metal material, the fifth metal material, and the sixth metal material, and removing a residue of the dry etched combination of the fourth metal material, the fifth metal material, and the sixth metal material. The fourth metallic material may be, for example, titanium, the fifth metallic material may be, for example, aluminum, and the sixth metallic material may be, for example, titanium.

The first touch sensing electrode106and the second touch sensing electrode108are configured to generate a touch sensing signal when the touch device receives a touch force.

A first gap is formed between the bridge portion1061of the first touch sensing electrode106and the second touch sensing electrode108. Capacitance is formed between the bridge portion1061of the first touch sensing electrode106and the second touch sensing electrode108. When the touch force is applied, the bridge portion1061of the first touch sensing electrode106moves relative to the second touch sensing electrode108, or the second touch sensing electrode108moves relative to the bridge portion1061of the first touch sensing electrode106, and the capacitance between the second touch sensing electrode108and the first touch sensing electrode106changes. The first touch sensing electrode106and/or the second touch sensing electrode108generate the touch sensing signal.

The protective layer109is formed by disposing an organic material on the first touch sensing electrode106, the second touch sensing electrode108, and a portion of the second organic insulating layer107which is not covered by the first touch sensing electrode106and the second touch sensing electrode108, performing yellow light irradiation on the organic material, baking the organic material after performing the yellow light irradiation; and ashing the baked organic material to form the protective layer.

Material of any one of the first organic insulating layer105, the second organic insulating layer107, and the protective layer109is a photoresist material, resin material, or polyimide material.

A first via hole and a second via hole are disposed on the second organic insulating layer107, and the first through hole and the second through hole both penetrate through the second organic insulating layer107. In a direction perpendicular to a plane which the display device faces, at least a portion of the bridge portion1061of the first touch sensing electrode106is disposed in the first via hole and the second via hole.

The protective layer109is disposed on the first touch sensing electrode106and the second touch sensing electrode108, and disposed on the portion of the second organic insulating layer107which is not covered by the first touch sensing electrode106and the second touch sensing electrode108.

Referring toFIG. 2toFIG. 5.FIG. 2is a flow chart of a method for manufacturing a touch display assembly of the present disclosure.FIG. 3is a flow chart of steps of disposing a first organic insulating layer105on a display device in the method for manufacturing the touch display assembly as shown inFIG. 2.FIG. 4is a flow chart of steps of disposing a second organic insulating layer107on the first organic insulating layer105in the method for manufacturing the touch display assembly as shown inFIG. 2.FIG. 5is a flow chart of steps of disposing a protective layer109on a first touch sensing electrode106, a second touch sensing electrode108, and the second organic insulating layer107in the method for manufacturing the touch display assembly as shown inFIG. 2.

A method for manufacturing a touch display assembly in the present disclosure includes the following steps.

A step A (201) of forming a display device.

A step B (202) of disposing a first organic insulating layer105on the display device.

Specifically, the step B (202) includes:

A step b1 (2021) of cleaning a surface of the display device (an encapsulation layer104).

A step b2 (2022) of disposing a first organic insulating material on the surface of the display device (the encapsulation layer104).

A step b3 (2023) of curing the first organic insulating material.

A step b4 (2024) of ashing the cured first organic insulating material to form the first organic insulating layer105.

A step C (203) of disposing a second organic insulating layer107on the first organic insulating layer105.

Specifically, the step C (203) includes:

A step c1 (2031) of cleaning a surface of the bridge portion1061of a first touch sensing electrode106and a surface of a portion of the first organic insulating layer105which is not covered by the bridge portion.

A step c2 (2032) of disposing a second organic insulating material on the surface of the bridge portion1061of the first touch sensing electrode106and the surface of the portion of the first organic insulating layer105which is not covered by the bridge portion1061.

A step c3 (2033) of curing the second organic insulating material.

A step c4 (2034) of ashing the cured second organic insulating material to form the second organic insulating layer107.

After the step B (202) and before the step C (203), the method further includes the following steps:

Step F: forming the bridge portion1061of the first touch sensing electrode106.

Specifically, the step F includes:

A step f1 of cleaning the surface of the first organic insulating layer105.

A step f2 of sequentially disposing a first metal material, a second metal material, and a third metal material on the surface of the first organic insulating layer105. The first metallic material may be, for example, titanium, the second metallic material may be, for example, aluminum, and the third metallic material may be, for example, titanium.

A step f3 of performing a first photomask process on a combination of the first metal material, the second metal material, and the third metal material.

A step f4 of baking the combination of the first metal material, the second metal material, and the third metal material which were subject to the first photomask process.

A step f5 of performing a dry etching process on the baked combination of the first metal material, the second metal material, and the third metal material.

A step f6 of removing a residue of the dry etched combination of the first metal material, the second metal material, and the third metal material, to form the bridge portion1061of the first touch sensing electrode106.

A step D (204) of disposing the first touch sensing electrode106and a second touch sensing electrode108on the second organic insulating layer107, wherein in a direction perpendicular to a plane which the display device faces, the bridge portion1061of the first touch sensing electrode106passes through the second organic insulating layer107and is overlapped by the second touch sensing electrode108.

Specifically, the step D (204) includes:

A step d1 of cleaning a surface of the second organic insulating layer107.

A step d2 of sequentially disposing a fourth metal material, a fifth metal material, and a sixth metal material on the surface of the second organic insulating layer107. The fourth metallic material may be, for example, titanium, the fifth metallic material may be, for example, aluminum, and the sixth metallic material may be, for example, titanium.

A step d3 of performing a second photomask process on a combination of the fourth metal material, the fifth metal material, and the sixth metal material.

A step d4 of baking the combination of the fourth metal material, the fifth metal material, and the sixth metal material which were subject to the second photomask process.

A step d5 of performing the dry etching process on the baked combination of the fourth metal material, the fifth metal material, and the sixth metal material.

A step d6 of removing a residue of the dry etched combination of the fourth metal material, the fifth metal material, and the sixth metal material to form the first touch sensing electrode106and the second touch sensing electrode108.

A step E (205) of disposing a protective layer109on the first touch sensing electrode106, the second touch sensing electrode108, and a portion of the second organic insulating layer107which is not covered by the first touch sensing electrode106and the second touch sensing electrode108.

Specifically, the step E (205) includes:

A step e1 (2051) of disposing an organic material on the first touch sensing electrode106, the second touch sensing electrode108, and the portion of the second organic insulating layer107which is not covered by the first touch sensing electrode106and the second touch sensing electrode108.

A step e2 (2052) of performing yellow light irradiation on the organic material;

A step e3 (2053) of baking the organic material after performing the yellow light irradiation.

A step e4 (2054) of ashing the baked organic material to form the protective layer109.

Material of any one of the first organic insulating layer105, the second organic insulating layer107, and the protective layer109is a photoresist material, resin material, or polyimide material.

After the step C (203), and before the step D (204), the method for manufacturing the touch display assembly further includes the following steps:

A step G of forming a first via hole and a second via hole on the second organic insulating layer107, wherein the first via hole and the second via hole both penetrate through the second organic insulating layer107.

The step A (201) includes:

A step a1 of disposing a thin film transistor device layer102on the substrate101.

A step a2 of disposing a light emitting device layer103on the thin film transistor device layer102.

A step a3 of disposing the encapsulation layer104on the light emitting device layer103.

The step B (202) is disposing the first organic insulating layer105on the encapsulation layer104of the display device.

After the step a3, the method for manufacturing the touch display assembly further includes the following steps:

A step H of disposing an array of protrusions and/or an array of depressions on a surface of the encapsulation layer of the display device, wherein the array of protrusions includes at least two protrusions, the array of depressions includes at least two depressions, and the protrusions and/or the depressions are configured to improve a coupling between the first organic insulating layer105and the encapsulating layer104.

In the present disclosure, by stacking the first organic insulating layer105, the first touch sensing electrode106, the second organic insulating layer107, the second touch sensing electrode108, and the protective layer109together, the touch device of the touch display assembly is formed. The first organic insulating layer105and the second organic insulating layer107have high ductility, so that after the touch display assembly undergoes many times of bending, separation of some of devices or films in the touch display assembly from other devices or films is avoided, which is beneficial to ensuring touch performance of the touch display assembly. In addition, the first organic insulating layer105and the second organic insulating layer107are able to effectively isolate the capacitance coupling between the devices or films in the touch display assembly of the present disclosure.

In summary, although the preferable embodiments of the present disclosure have been disclosed above, the embodiments are not intended to limit the present disclosure. A person of ordinary skill in the art, without departing from the spirit and scope of the present disclosure, can make various modifications and variations. Therefore, the scope of the disclosure is defined in the claims.