CN117539362A - Touch display device and manufacturing method thereof - Google Patents
Touch display device and manufacturing method thereof Download PDFInfo
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- CN117539362A CN117539362A CN202210923988.3A CN202210923988A CN117539362A CN 117539362 A CN117539362 A CN 117539362A CN 202210923988 A CN202210923988 A CN 202210923988A CN 117539362 A CN117539362 A CN 117539362A
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- touch panel
- adhesive layer
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- layer
- display device
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 239000010410 layer Substances 0.000 claims abstract description 88
- 239000000758 substrate Substances 0.000 claims abstract description 86
- 239000012790 adhesive layer Substances 0.000 claims abstract description 66
- 239000000565 sealant Substances 0.000 claims abstract description 31
- 239000012945 sealing adhesive Substances 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims description 9
- 230000000903 blocking effect Effects 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000009863 impact test Methods 0.000 abstract description 6
- 239000000463 material Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000011241 protective layer Substances 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 238000001962 electrophoresis Methods 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention provides a touch display device and a manufacturing method thereof. The touch display device comprises a driving substrate, a display medium layer, an electrode substrate, a touch panel, a flexible circuit board, a water-blocking adhesive layer and a sealing adhesive layer. The touch panel is arranged on the electrode substrate and provided with a joint region. The flexible circuit board is connected to the connection area of the touch panel and extends out of the touch panel. The water-blocking adhesive layer is directly connected between the bottom surface of the flexible circuit board positioned outside the touch panel and the top surface of the driving substrate. The sealant layer is arranged on the driving substrate and seals the edge of the display medium layer, the edge of the electrode substrate and the edge of the touch panel. The sealing adhesive layer is positioned between the water-blocking adhesive layer and the edge of the display medium layer in section. The touch display device has better structural reliability and can pass the cold and hot impact test.
Description
Technical Field
The present disclosure relates to display devices and, particularly, to a touch display device and a method for manufacturing the same.
Background
At present, in the manufacturing process of the electrophoretic display module, after the upper electrode substrate is attached, sealant is coated, and the space formed by the upper electrode substrate and the driving substrate is fully distributed by using the sealant, so that the aim of preventing the invasion of moisture is fulfilled. However, after the upper electrode substrate is attached, the surface of the upper electrode substrate is still provided with a protective layer, and the material property of the sealant has excellent affinity with the plastic substrate, so that the coated sealant can easily climb up and overflow onto the protective layer. When the protective layer is torn off, a glue protrusion of the sealant is formed. Subsequently, when the touch panel is attached to the electrophoresis display module to form the touch display device, the metal circuit on the touch panel is easily damaged because the joint area of the touch panel is just above the glue protrusion of the sealant, and the touch display device is further caused to fail in cold and hot impact test.
Disclosure of Invention
The invention is directed to a touch display device with better structural reliability, which can pass cold and hot impact tests.
The invention also aims at a manufacturing method of the touch display equipment, which is used for manufacturing the touch display equipment.
According to an embodiment of the invention, a touch display device includes a driving substrate, a display medium layer, an electrode substrate, a touch panel, a flexible circuit board, a water-blocking adhesive layer and a sealing adhesive layer. The display medium layer is configured on the driving substrate. The electrode substrate is disposed on the display medium layer. The touch panel is arranged on the electrode substrate and provided with a joint region. The flexible circuit board is connected to the connection area of the touch panel and extends out of the touch panel. The water-blocking adhesive layer is directly connected between the bottom surface of the flexible circuit board positioned outside the touch panel and the top surface of the driving substrate. The sealant layer is arranged on the driving substrate and seals the edge of the display medium layer, the edge of the electrode substrate and the edge of the touch panel. The sealing adhesive layer is positioned between the water-blocking adhesive layer and the edge of the display medium layer in section.
In the touch display device according to the embodiment of the invention, the edge of the display medium layer is retracted from the edge of the electrode substrate to form a space. The sealant layer fills the space and extends to and covers the edge of the electrode substrate and the edge of the touch panel.
In an embodiment of the invention, the touch display device further includes an adhesive layer disposed between the touch panel and the electrode substrate.
In the touch display device according to the embodiment of the invention, the touch display device further includes a light guide plate and a cover plate. The light guide plate is arranged on the touch panel. The cover plate is disposed on the light guide plate.
In the touch display device according to the embodiment of the invention, the touch display device further includes a first adhesive layer and a second adhesive layer. The first adhesive layer is arranged between the light guide plate and the touch panel. The second adhesive layer is disposed between the cover plate and the light guide plate.
In the touch display device according to the embodiment of the invention, the touch display device further includes an external circuit connected to the driving substrate.
According to an embodiment of the invention, a manufacturing method of a touch display device includes the following steps. Sequentially forming a display medium layer and an electrode substrate on the driving substrate. And bonding the flexible circuit board to the bonding area of the touch panel. The flexible circuit board extends out of the touch panel. And attaching a water-blocking adhesive layer on the flexible circuit board outside the touch panel, wherein the water-blocking adhesive layer is directly connected with the bottom surface of the flexible circuit board. The touch panel is bonded to the electrode substrate, so that the water-blocking adhesive layer is directly attached to the top surface of the driving substrate. And filling the sealant layer on the driving substrate to seal the edges of the display medium layer, the electrode substrate and the touch panel. The sealing adhesive layer is positioned between the water-blocking adhesive layer and the edge of the display medium layer in section.
In the method for manufacturing a touch display device according to an embodiment of the invention, the method for manufacturing a touch display device further includes providing a light guide plate on a touch panel; and providing a cover plate on the light guide plate.
In the method for manufacturing a touch display device according to an embodiment of the invention, the method for manufacturing a touch display device further includes forming a first adhesive layer between the light guide plate and the touch panel; and forming a second adhesive layer between the cover plate and the light guide plate.
In the method for manufacturing the touch display device according to the embodiment of the invention, the edge of the display medium layer is retracted by a distance relative to the edge of the electrode substrate to form a space. The sealant layer fills the space and extends to and covers the edge of the electrode substrate and the edge of the touch panel.
Based on the above, in the design of the touch display device of the present invention, the water-blocking adhesive layer is directly connected between the bottom surface of the flexible circuit board located outside the touch panel and the top surface of the driving substrate, and the sealing adhesive layer is located between the water-blocking adhesive layer and the edge of the display medium layer in the view of the section. That is, the bottom surface of the flexible circuit board outside the touch panel is not provided with a sealant layer, so that the metal circuit on the touch panel is not damaged. Therefore, the touch display device of the invention can have better structural reliability and can pass the cold and hot impact test.
Drawings
FIG. 1 is a schematic top view of a touch display device according to an embodiment of the invention;
FIG. 2 is a schematic cross-sectional view taken along line I-I of FIG. 1;
fig. 3 is a schematic cross-sectional view along line II-II of fig. 1.
Description of the reference numerals
100, touch control display equipment;
110, a display panel;
112, driving the substrate;
113, top surface;
114, displaying a medium layer;
115. 117, 121 edges;
116 an electrode substrate;
120, a touch panel;
130, a flexible circuit board;
131, the bottom surface;
140, a water-blocking adhesive layer;
150, a sealant layer;
160, a light guide plate;
170, a cover plate;
180 an external circuit;
192. 194, 196 an adhesive layer;
a junction region;
g, distance;
s, space.
Detailed Description
Reference will now be made in detail to the exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings and the description to refer to the same or like parts.
Embodiments of the invention may be understood in conjunction with the accompanying drawings, which are also considered part of the disclosure. It should be understood that the drawings of the present invention are not drawn to scale and that virtually any enlargement or reduction of the size of the components is possible in order to clearly demonstrate the features of the present invention. Furthermore, when referring to a first layer being on or over a second layer, it may include the case where the first layer is in direct contact with the second layer or the case where there may be no direct contact between the first layer and the second layer, i.e., one or more other structural layers may be spaced between the first layer and the second layer. However, if the first layer is directly on the second layer, this means that the first layer is in direct contact with the second layer.
Fig. 1 is a schematic top view of a touch display device according to an embodiment of the invention. Fig. 2 is a schematic cross-sectional view along line I-I of fig. 1. Fig. 3 is a schematic cross-sectional view along line II-II of fig. 1. Referring to fig. 1, fig. 2, and fig. 3, in the present embodiment, the touch display device 100 includes a driving substrate 112, a display medium layer 114, an electrode substrate 116, a touch panel 120, a flexible circuit board 130, a water-blocking adhesive layer 140, and a sealant layer 150. The display medium layer 114 is disposed on the driving substrate 112. The electrode substrate 116 is disposed on the display medium layer 114. The touch panel 120 is disposed on the electrode substrate 116 and has a bonding region B. The flexible circuit board 130 is bonded to the bonding region B of the touch panel 120 and extends out of the touch panel 120. The water-blocking adhesive layer 140 is directly connected between the bottom surface 131 of the flexible circuit board 130 and the top surface 113 of the driving substrate 112, which are located outside the touch panel 120. The sealant layer 150 is disposed on the driving substrate 112, and seals the edge 115 of the display medium layer 114, the edge 117 of the electrode substrate 116, and the edge 121 of the touch panel 120. The sealant layer 150 is located between the water blocking adhesive layer 140 and the edge 115 of the display medium layer 114 in cross section.
In detail, in the present embodiment, the driving substrate 112 is, for example, an active device array substrate, such as a Thin Film transistor (Thin Film Transistor, TFT) array substrate or a Thin Film Diode (TFD) array substrate, but not limited thereto. The electrode substrate 116 is composed of, for example, a transparent substrate, a barrier layer, and a transparent electrode layer (e.g., an ITO layer), but is not limited thereto. Here, the driving substrate 112, the display medium layer 114, and the electrode substrate 116 may define the display panel 110, wherein the display panel 110 is, for example, but not limited to, an electrophoretic display panel, an organic light emitting diode display panel, or a liquid crystal display panel.
As shown in fig. 1 and 2, in the present embodiment, at the joint region B of the touch panel 120, the edge 115 of the display medium layer 114 is retracted by a distance G relative to the edge 117 of the electrode substrate 116 to form a space S, and the sealant layer 150 fills the space S as viewed along the cross section (i.e., along the sectional line I-I). The sealant layer 150 extends over the edge 117 of the electrode substrate 116 and the edge 121 of the touch panel 120 as viewed along another cross-section (i.e., along the cross-section line II-II). Since the water blocking adhesive layer 140 of the embodiment is directly connected between the bottom surface 131 of the flexible circuit board 130 outside the touch panel 120 and the top surface 113 of the driving substrate 112, the bottom surface 131 of the flexible circuit board 130 outside the touch panel 120 will not have the sealant layer 150, so as not to damage the circuit of the touch panel 120. Therefore, the touch display device 100 of the present embodiment can have a better structural reliability and can pass the cold and hot impact test.
Furthermore, the touch display device 100 of the present embodiment further includes an adhesive layer 192 disposed between the touch panel 120 and the electrode substrate 116, wherein the touch panel 120 is fixed on the electrode substrate 116 through the adhesive layer 192. Furthermore, the touch display device 100 further includes a light guide plate 160 and a cover plate 170. The light guide plate 160 is disposed on the touch panel 120, and the cover 170 is disposed on the light guide plate 160. The touch display device 100 of the present embodiment further includes an adhesive layer 194 (i.e., a first adhesive layer) and an adhesive layer 196 (i.e., a second adhesive layer). The adhesive layer 194 is disposed between the light guide plate 160 and the touch panel 120, wherein the light guide plate 160 is fixed on the touch panel 120 through the adhesive layer 194. The adhesive layer 196 is disposed between the cover plate 170 and the light guide plate 160, wherein the cover plate 170 is fixed on the light guide plate 160 by the adhesive layer 196. In addition, the touch display device 100 of the present embodiment further includes an external circuit 180, which is structurally and electrically connected to the driving substrate 112. Here, the external circuit 180 is, for example, a flexible circuit board, but not limited thereto.
In one embodiment, the thickness of the water blocking layer 140 is, for example, the thickness of the display medium layer 114 (e.g., 55 micrometers) plus the thickness of the electrode substrate 116 (e.g., 10 micrometers) and plus the thickness of the adhesive layer 192 (e.g., 50 micrometers). The thickness of the driving substrate 112 (e.g., 14 micrometers) is approximately equal to the thickness of the touch panel 120 (e.g., 13 micrometers). The thickness of the cover plate 170, the thickness of the light guide plate 160, the thickness of the adhesive layer 194, the thickness of the adhesive layer 196, the thickness of the flexible circuit board 130, and the thickness of the external circuit 180 are approximately the same, for example, 50 μm, respectively.
In the manufacturing process of the touch display device 100, referring to fig. 2 again, the display medium layer 114 and the electrode substrate 116 can be sequentially formed on the driving substrate 112. On the other hand, the flexible circuit board 130 may be bonded to the bonding region B of the touch panel 120, wherein the flexible circuit board 130 extends out of the touch panel 120. Next, the water-blocking adhesive layer 140 is attached to the flexible circuit board 130 outside the touch panel 120, wherein the water-blocking adhesive layer 140 is directly connected to the bottom surface 131 of the flexible circuit board 130. Next, the touch panel 120 with the water-blocking adhesive layer 140 is bonded to the electrode substrate 116 through the adhesive layer 192, so that the water-blocking adhesive layer 140 is directly adhered to the top surface 113 of the driving substrate 112. At this time, the water blocking layer 140 is directly connected between the bottom surface 131 of the flexible circuit board 130 and the top surface 113 of the driving substrate 112 outside the touch panel 120. Thereafter, the sealant layer 150 is filled on the driving substrate 112 to seal the edge 115 of the display medium layer 114, the edge 117 of the electrode substrate 116, and the edge 121 of the touch panel 120. In short, in the embodiment, the water-blocking adhesive layer 140 is first adhered to the touch panel 120, then the touch panel 120 with the water-blocking adhesive layer 140 is bonded to the display panel 110, and finally the sealant layer 150 is filled in the space S formed by the touch panel 120 and the display panel 110. Finally, an adhesive layer 194, a light guide plate 160, an adhesive layer 196 and a cover plate 170 are sequentially formed on the touch panel 120. The adhesive layer 194 is formed between the light guide plate 160 and the touch panel 120, and the light guide plate 160 is fixed on the touch panel 120 through the adhesive layer 194. The adhesive layer 196 is formed between the cover plate 170 and the light guide plate 160, and the cover plate 170 is fixed on the light guide plate 160 by the adhesive layer 196. Thus, the fabrication of the touch display device 100 is completed.
In an embodiment, if the adhesive material of the sealant layer 150 has low viscosity and is easy to permeate, the capillary seepage principle can be utilized to make the sealant layer 150 spread in two sides of the bonding area B circuit of the touch panel 120 and fill the space S. Since the bottom surface 131 of the flexible circuit board 130 located outside the touch panel 120 has no sealant layer 150, the circuit of the touch panel 120 is not damaged when the touch panel 120 is attached. On the other hand, if the adhesive material of the sealant 150 has high viscosity, the waterproof adhesive layer 140 is attached to the bottom surface 131 of the flexible circuit board 130, then the touch panel 120 with the waterproof adhesive layer 140 attached thereto is assembled to the display panel 110, and finally the sealant 150 is filled. Therefore, the sealant layer 150 only needs to be filled/coated in the space S inside the water blocking adhesive layer 140. Since the bottom surface 131 of the flexible circuit board 130 located outside the touch panel 120 has no sealant layer 150, the circuit of the touch panel 120 is not damaged when the touch panel 120 is attached.
In summary, in the design of the touch display device of the present invention, the water-blocking adhesive layer is directly connected between the bottom surface of the flexible circuit board located outside the touch panel and the top surface of the driving substrate, and the sealing adhesive layer is located between the water-blocking adhesive layer and the edge of the display medium layer in a cross-sectional view. That is, the bottom surface of the flexible circuit board outside the touch panel is not provided with a sealant layer, so that the metal circuit on the touch panel is not damaged. Therefore, the touch display device of the invention can have better structural reliability and can pass the cold and hot impact test.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (10)
1. A touch display device, comprising:
a driving substrate;
a display medium layer disposed on the driving substrate;
an electrode substrate disposed on the display medium layer;
the touch panel is arranged on the electrode substrate and is provided with a joint area;
the flexible circuit board is connected to the joint area of the touch panel and extends out of the touch panel;
the water blocking adhesive layer is directly connected between the bottom surface of the flexible circuit board positioned outside the touch panel and the top surface of the driving substrate; and
and the sealing adhesive layer is configured on the driving substrate, seals the edge of the display medium layer, the edge of the electrode substrate and the edge of the touch panel, wherein the sealing adhesive layer is positioned between the water-blocking adhesive layer and the edge of the display medium layer in a section view.
2. The touch display device of claim 1, wherein an edge of the display medium layer is retracted a distance relative to an edge of the electrode substrate to form a space, and the sealant layer fills the space and extends to cover the edge of the electrode substrate and the edge of the touch panel.
3. The touch display device of claim 1, further comprising:
the adhesion layer is arranged between the touch panel and the electrode substrate.
4. The touch display device of claim 1, further comprising:
the light guide plate is configured on the touch panel; and
and the cover plate is configured on the light guide plate.
5. The touch display device of claim 4, further comprising:
the first adhesive layer is arranged between the light guide plate and the touch panel; and
the second adhesive layer is arranged between the cover plate and the light guide plate.
6. The touch display device of claim 1, further comprising:
and an external circuit connected with the driving substrate.
7. The manufacturing method of the touch display device is characterized by comprising the following steps of:
sequentially forming a display medium layer and an electrode substrate on a driving substrate;
bonding a flexible circuit board to a bonding area of a touch panel, wherein the flexible circuit board extends out of the touch panel;
attaching a water-blocking adhesive layer on the flexible circuit board outside the touch panel, wherein the water-blocking adhesive layer is directly connected with the bottom surface of the flexible circuit board;
bonding the touch panel to the electrode substrate, so that the water-blocking adhesive layer is directly attached to the top surface of the driving substrate; and
and filling a sealing adhesive layer on the driving substrate to seal the edge of the display medium layer, the edge of the electrode substrate and the edge of the touch panel, wherein the sealing adhesive layer is positioned between the water-blocking adhesive layer and the edge of the display medium layer in a section view.
8. The method for manufacturing a touch display device according to claim 7, further comprising:
providing a light guide plate on the touch panel; and
and providing a cover plate on the light guide plate.
9. The method for manufacturing a touch display device according to claim 8, further comprising:
forming a first adhesive layer between the light guide plate and the touch panel; and
forming a second adhesive layer between the cover plate and the light guide plate.
10. The method of claim 7, wherein the edge of the display medium layer is retracted relative to the edge of the electrode substrate to form a space, and the sealant layer fills the space and extends to cover the edge of the electrode substrate and the edge of the touch panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210923988.3A CN117539362A (en) | 2022-08-02 | 2022-08-02 | Touch display device and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210923988.3A CN117539362A (en) | 2022-08-02 | 2022-08-02 | Touch display device and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117539362A true CN117539362A (en) | 2024-02-09 |
Family
ID=89788655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210923988.3A Pending CN117539362A (en) | 2022-08-02 | 2022-08-02 | Touch display device and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117539362A (en) |
-
2022
- 2022-08-02 CN CN202210923988.3A patent/CN117539362A/en active Pending
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