CN108920010B - Touch screen and OLED display panel - Google Patents
Touch screen and OLED display panel Download PDFInfo
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- CN108920010B CN108920010B CN201810840868.0A CN201810840868A CN108920010B CN 108920010 B CN108920010 B CN 108920010B CN 201810840868 A CN201810840868 A CN 201810840868A CN 108920010 B CN108920010 B CN 108920010B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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Abstract
The embodiment of the invention discloses a touch screen, which comprises: a flexible substrate layer; the touch sensing layer is arranged on the flexible substrate layer and comprises a plurality of first conductive circuits and second conductive circuits which are arranged in an insulating and overlapping mode, each first conductive circuit comprises a plurality of first sensing electrodes which are arranged at intervals and connected with each other, and each second conductive circuit comprises a plurality of second sensing electrodes which are arranged at intervals; the insulating layer is arranged on the touch sensing layer; the plurality of connecting bridges are arranged on the insulating layer, and each connecting bridge is connected with two adjacent second sensing electrodes on the same second conductive circuit through a via hole arranged on the insulating layer; and a plurality of dummy pattern blocks insulated from the first conductive circuit and the second conductive circuit are arranged on the touch sensing layer at intervals. The invention also discloses a corresponding OLED display panel. By implementing the embodiment of the invention, the winding and folding performance of the touch sensing circuit in the touch screen can be improved, and the optimal mutual capacitance value of the nodes can be better adjusted and matched.
Description
Technical Field
The invention relates to the field of display, in particular to a touch screen and an OLED display panel.
Background
The touch screen has the advantages of high response speed, accurate positioning, multi-point touch support, long service life and the like, and is widely applied to various devices (such as mobile terminals). The flexible touch display is a display technology with competitive advantages in the future, and has the great advantages of foldability and rollability, so that a larger display area can be obtained without occupying a larger space, and the flexible touch display is convenient to carry. The existing folding technology is to use a flexible PI (polyimide) substrate, and to fabricate thin film transistors, OLED (organic light emitting diode) devices and other elements thereon, and finally add a laminated module formed by a flexible touch panel, a polarizer and a protective glass.
Because the flexible bendable part must bear tens of thousands of folds, the structural strength and the reliability of an electric circuit are very important, and the capacitive touch panel is adopted as an essential component on the touch display panel at present and is mainly realized by plating a capacitive sensing pattern on a flexible substrate; the flexible substrate may be a flexible display device thin film encapsulation layer or a flexible optical material layer, for example, a Cyclic Olefin Polymer (COP) or a Polyethylene terephthalate (PET) material; however, due to the characteristics of the existing capacitive sensing circuit and the design and materials, there are some problems in manufacturing a flexible touch panel, and Indium-Tin Oxide (ITO) material has relatively good light transmittance but certain brittleness, so that the circuit is easily damaged when the circuit is bent and curled; other metal materials (such as AgNW, Ag wire, and Ag alloy material) have better bending resistance, but have poor light transmittance, are prone to cause problems such as interference of display panels, and have poor optical characteristics.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a touch screen and an OLED display panel, which can improve the bending performance of a touch sensing line in a touch sensing layer in the touch screen, and can better adjust and match an optimal node mutual capacitance value.
In order to solve the above technical problem, an aspect of an embodiment of the present invention provides a touch screen, including:
a flexible substrate layer;
the touch sensing layer is arranged on the flexible substrate layer and at least comprises a plurality of first conductive circuits extending along a first direction and a second conductive circuit extending along a second direction, the second conductive circuits and the first conductive circuits are arranged in an insulating and overlapping mode, each first conductive circuit comprises a plurality of first sensing electrodes which are arranged at intervals and connected with each other, and each second conductive circuit comprises a plurality of second sensing electrodes which are arranged at intervals;
the insulating layer is arranged on the touch sensing layer;
the plurality of connecting bridges are arranged on the insulating layer, and each connecting bridge is connected with two adjacent second sensing electrodes on the same second conductive circuit through a via hole arranged on the insulating layer;
and a plurality of dummy pattern blocks insulated from the first conductive circuit and the second conductive circuit are arranged on the touch sensing layer at intervals.
Wherein, further include:
and the passivation layer is arranged on the connecting bridge and the insulating layer.
The dummy pattern blocks are made of the same material as the first sensing electrodes or the second sensing electrodes, and are circular, rectangular, rhombic, star-shaped or strip-shaped.
The dummy pattern blocks are uniformly arranged in each of the first sensing electrodes and the second sensing electrodes and are insulated from the first sensing electrodes and the second sensing electrodes.
Wherein the dummy pattern block is disposed between the adjacent first and second sensing electrodes and insulated from the first and second sensing electrodes.
Wherein the first sensing electrode is one of a driving electrode and a sensing electrode, and the second sensing electrode is the other of the driving electrode and the sensing electrode.
Accordingly, another aspect of the embodiments of the present invention also provides an OLED display panel, which at least includes:
a substrate base plate;
a TFT layer disposed on the base substrate,
an OLED device layer disposed on the TFT layer;
an encapsulation layer disposed over the OLED device layer;
the touch screen is arranged on the packaging layer;
wherein the touch screen includes:
a flexible substrate layer;
the touch sensing layer is arranged on the flexible substrate layer and at least comprises a plurality of first conductive circuits extending along a first direction and a second conductive circuit extending along a second direction, the second conductive circuits and the first conductive circuits are arranged in an insulating and overlapping mode, each first conductive circuit comprises a plurality of first sensing electrodes which are arranged at intervals and connected with each other, and each second conductive circuit comprises a plurality of second sensing electrodes which are arranged at intervals;
the insulating layer is arranged on the touch sensing layer;
the plurality of connecting bridges are arranged on the insulating layer, and each connecting bridge is connected with two adjacent second sensing electrodes on the same second conductive circuit through a via hole arranged on the insulating layer;
a passivation layer disposed over the connection bridge and the insulating layer;
and a plurality of dummy pattern blocks insulated from the first conductive circuit and the second conductive circuit are arranged on the touch sensing layer at intervals.
The dummy pattern blocks are made of the same material as the first sensing electrodes or the second sensing electrodes, and are circular, rectangular, rhombic, star-shaped or strip-shaped.
The dummy pattern blocks are uniformly arranged in each of the first sensing electrodes and the second sensing electrodes and are insulated from the first sensing electrodes and the second sensing electrodes.
Wherein the dummy pattern block is disposed between the adjacent first and second sensing electrodes and insulated from the first and second sensing electrodes.
The embodiment of the invention has the following beneficial effects:
in the touch screen and the OLED display panel provided by the invention, the plurality of virtual pattern blocks are arranged in the touch sensing layer at intervals, so that the surface stress of the touch sensing surface is uniform, the stress concentration of the sensing circuit is avoided, and the flexibility of the circuit of the touch sensing panel is enhanced, thereby solving the reliability problems of circuit breakage and the like possibly caused when the touch panel is repeatedly bent or bent and curled under an external force;
meanwhile, due to the addition of the virtual pattern blocks, the optimal induction capacitance value can be matched between the driving electrode and the induction electrode by adjusting the size and the number of the virtual pattern blocks, namely the optimal node mutual capacitance value can be better adjusted and matched;
in addition, the scattered virtual pattern blocks can be designed to avoid the generation of etching lines and ensure the display effect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a part of a sensing line in an embodiment of a touch sensing layer of a touch screen according to the present invention;
FIG. 2 is a schematic diagram of a touch unit of FIG. 1;
FIG. 3 is a schematic cross-sectional view of a touch panel taken along the line A-A in FIG. 2 according to the present invention;
FIG. 4 is a schematic diagram of a touch unit in another embodiment of a touch screen provided in the present invention;
fig. 5 is a schematic structural diagram of an embodiment of an OLED display panel provided in the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the scheme according to the present invention are shown in the drawings, and other details not so relevant to the present invention are omitted.
Fig. 1 is a schematic structural diagram of a part of a sensing circuit in an embodiment of a touch sensing layer of a touch screen according to the present invention; as shown in fig. 2 to 3, in this embodiment, the touch screen 1 specifically includes:
a flexible substrate layer 10, which may be a flexible substrate of COP or PET material;
a touch sensing layer 11 disposed on the flexible substrate layer, and at least including a plurality of first conductive traces 14 extending along a first direction (e.g., y direction) and a second conductive trace 15 extending along a second direction (e.g., x direction), where the second conductive trace 15 and the first conductive trace 14 are overlapped in an insulating manner, each of the first conductive traces 14 includes a plurality of first sensing electrodes 140 arranged at intervals and connected to each other, and each of the second conductive traces 15 includes a plurality of second sensing electrodes 150 arranged at intervals; it is to be understood that the number of first conductive traces 14 and second conductive traces 15 shown in fig. 1 is by way of example only, and not by way of limitation; the first sensing electrode 140 is one of a driving electrode and a sensing electrode, and the second sensing electrode 150 is the other of the driving electrode and the sensing electrode; specifically, in one example, the first sensing electrode 140 is a driving electrode, and the second sensing electrode 150 is a sensing electrode; in another example, the first sensing electrode 140 may be a sensing electrode, and the second sensing electrode 150 may be a driving electrode. The driving electrode is used for inputting a driving signal, the sensing electrode is used for receiving a detection signal, and when touch detection is carried out, the mutual capacitance change at the intersection of two conductive circuits or the self capacitance change of each conductive circuit is detected, namely the position of a touch point is obtained in a self capacitance or mutual capacitance mode. If a coordinate system is established in the first direction y and the second direction x, the position of the obtained touch point can be represented by the coordinate system, and according to the conventional practice, the first direction y and the second direction x are generally defined to be perpendicular to each other, so that the capacitance detection is easier and the coordinate positioning is more convenient. When the touch screen 1 has other shapes (circular, irregular or curved), the first direction y and the second direction x may be set to be non-perpendicularly crossed;
the insulating layer 12 is arranged on the touch sensing layer 11 and covers a gap in the touch sensing layer 11 to realize insulation between the first conductive circuit 14 and the second conductive circuit 15;
a plurality of connecting bridges 151 disposed on the insulating layer 12, wherein each connecting bridge 151 is connected to two adjacent second sensing electrodes 150 on the same second conductive trace 150 through a via hole 152 disposed on the insulating layer 12, and specifically, two ends of each connecting bridge 151 are electrically connected to two adjacent second sensing electrodes 150 through one via hole 152;
the passivation layer 13 is disposed on the connection bridge 151 and the insulating layer 12, and the passivation layer 13 is used to isolate the first sensing electrode 140 and the second sensing electrode 150 in the touch sensing layer 11 from contacting air, so as to prevent the lines from being oxidized.
A plurality of dummy pattern blocks 16 insulated from the first conductive traces 14 and the second conductive traces 15 are disposed at intervals on the touch sensing layer 11.
In the example shown in fig. 1 and 2, the dummy pattern block 16 is uniformly disposed in each of the first and second sensing electrodes 140 and 150 and insulated from the first and second sensing electrodes 140 and 140, and as can be seen from fig. 3, a gap is disposed between the dummy pattern block 16 and the first and second sensing electrodes 140 and 150, and the insulation is achieved by deposition of the insulating layer 12.
The dummy pattern block 16 is made of the same material as the first sensing electrode 140 or the second sensing electrode 150, for example, a transparent conductive material, an ITO (indium tin oxide) material, or the like, and the dummy pattern block 16 may be a circular, rectangular, diamond, star, or bar pattern block. It is understood that the same material is used for the connecting bridge 151.
It can be understood that, by uniformly arranging the plurality of dummy pattern blocks 16 between the first sensing electrode 140 and the second sensing electrode 150, on one hand, such a design can make the surface stress of the touch sensing surface uniform, avoid the stress concentration of the sensing line, and make the line of the touch sensing panel enhance the flexibility, thereby solving the reliability problem that the line may break and the like when the touch sensing panel is repeatedly bent or curled under an external force; on the other hand, due to the addition of the virtual pattern blocks 16, the optimal induction capacitance value can be matched between the driving electrode and the induction electrode by adjusting the size and the number of the virtual pattern blocks 16, namely, the optimal node mutual capacitance value can be better adjusted and matched; meanwhile, the scattered virtual pattern blocks can be designed to avoid the generation of etching lines and ensure the display effect.
Fig. 4 is a schematic structural diagram of a touch unit in another embodiment of a touch screen provided by the invention; it is different from the structure of the touch unit in fig. 2 in that the position where the dummy pattern block 16 is disposed is different. In the present embodiment, the dummy pattern block 16 is disposed between the adjacent first and second sensing electrodes 140 and 150, and is insulated from the first and second sensing electrodes 140 and 150. It is understood that the dummy pattern block 16 in fig. 4 is a bar, and in other embodiments, the dummy pattern block 16 may be configured as one or more circular, rectangular, diamond, or star pattern blocks. In the present embodiment, advantageous effects similar to those of the embodiment of fig. 2 can also be achieved.
Correspondingly, the invention further provides an OLED display panel. Fig. 5 is a schematic structural diagram illustrating an embodiment of an OLED display panel according to the present invention. In this embodiment, the OLED display panel at least includes:
a base substrate 5;
a TFT layer 4 provided on the base substrate 5,
the OLED device layer 3 is arranged on the TFT layer 4;
an encapsulation layer 2 disposed over the OLED device layer 3;
the touch screen 1 is arranged on the packaging layer 2;
the touch screen 1 adopts the touch screen shown in fig. 1 to 3, and more details can be referred to the description of fig. 1 to 3, which is not described in detail here.
In some embodiments, structures such as a polarizer, a glass protective layer, etc. may also be disposed on the touch screen 1.
The embodiment of the invention has the following beneficial effects:
in the touch screen and the OLED display panel provided by the invention, the plurality of virtual pattern blocks are arranged in the touch sensing layer at intervals, so that the surface stress of the touch sensing surface is uniform, the stress concentration of the sensing circuit is avoided, and the flexibility of the circuit of the touch sensing panel is enhanced, thereby solving the reliability problems of circuit breakage and the like possibly caused when the touch panel is repeatedly bent or bent and curled under an external force;
meanwhile, due to the addition of the virtual pattern blocks, the optimal induction capacitance value can be matched between the driving electrode and the induction electrode by adjusting the size and the number of the virtual pattern blocks, namely the optimal node mutual capacitance value can be better adjusted and matched;
in addition, the scattered virtual pattern blocks can be designed to avoid the generation of etching lines and ensure the display effect.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing is directed to embodiments of the present application and it is noted that numerous modifications and adaptations may be made by those skilled in the art without departing from the principles of the present application and are intended to be within the scope of the present application.
Claims (6)
1. A touch screen, comprising:
a flexible substrate layer;
the touch sensing layer is arranged on the flexible substrate layer and at least comprises a plurality of first conductive circuits extending along a first direction and a second conductive circuit extending along a second direction, the second conductive circuits and the first conductive circuits are arranged in an insulating and overlapping mode, each first conductive circuit comprises a plurality of first sensing electrodes which are arranged at intervals and connected with each other, and each second conductive circuit comprises a plurality of second sensing electrodes which are arranged at intervals;
the insulating layer is arranged on the touch sensing layer;
the plurality of connecting bridges are arranged on the insulating layer, and each connecting bridge is connected with two adjacent second sensing electrodes on the same second conductive circuit through a via hole arranged on the insulating layer;
the touch sensing layer is provided with a plurality of virtual pattern blocks insulated from the first conductive lines and the second conductive lines at intervals, and the virtual pattern blocks are uniformly arranged in each first sensing electrode and each second sensing electrode, or the virtual pattern blocks are arranged between the adjacent first sensing electrodes and the adjacent second sensing electrodes and are insulated from the first sensing electrodes and the second sensing electrodes.
2. The touch screen of claim 1, further comprising:
and the passivation layer is arranged on the connecting bridge and the insulating layer.
3. The touch screen of claim 2, wherein the dummy pattern blocks are made of the same material as the first sensing electrodes or the second sensing electrodes, and the dummy pattern blocks are circular, rectangular, diamond-shaped, star-shaped, or bar-shaped pattern blocks.
4. The touch screen of claim 3, wherein the first sensing electrode is one of a drive electrode and a sense electrode and the second sensing electrode is the other of the drive electrode and the sense electrode.
5. An OLED display panel comprising at least:
a substrate base plate;
the TFT layer is arranged on the substrate base plate;
an OLED device layer disposed on the TFT layer;
an encapsulation layer disposed over the OLED device layer;
the touch screen is arranged on the packaging layer;
characterized in that, the touch-sensitive screen includes:
a flexible substrate layer;
the touch sensing layer is arranged on the flexible substrate layer and at least comprises a plurality of first conductive circuits extending along a first direction and a second conductive circuit extending along a second direction, the second conductive circuits and the first conductive circuits are arranged in an insulating and overlapping mode, each first conductive circuit comprises a plurality of first sensing electrodes which are arranged at intervals and connected with each other, and each second conductive circuit comprises a plurality of second sensing electrodes which are arranged at intervals;
the insulating layer is arranged on the touch sensing layer;
the plurality of connecting bridges are arranged on the insulating layer, and each connecting bridge is connected with two adjacent second sensing electrodes on the same second conductive circuit through a via hole arranged on the insulating layer;
a passivation layer disposed over the connection bridge and the insulating layer;
the touch sensing layer is provided with a plurality of first conductive lines and a plurality of second conductive lines, wherein the first conductive lines and the second conductive lines are insulated by the first conductive lines and the second conductive lines, and the first conductive lines and the second conductive lines are insulated by the first conductive lines and the second conductive lines.
6. The OLED display panel of claim 5, wherein the dummy pattern block is made of the same material as the first sensing electrode or the second sensing electrode, and the dummy pattern block is a circular, rectangular, diamond, star or bar pattern block.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810840868.0A CN108920010B (en) | 2018-07-27 | 2018-07-27 | Touch screen and OLED display panel |
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| CN201810840868.0A CN108920010B (en) | 2018-07-27 | 2018-07-27 | Touch screen and OLED display panel |
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| CN108920010B true CN108920010B (en) | 2021-09-24 |
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| CN109634457A (en) * | 2018-12-03 | 2019-04-16 | 武汉华星光电半导体显示技术有限公司 | Touch control electrode and touch control display apparatus |
| CN109375840B (en) * | 2018-12-05 | 2020-10-16 | 武汉华星光电半导体显示技术有限公司 | Touch electrode unit, touch panel and touch display |
| US10860154B2 (en) | 2018-12-14 | 2020-12-08 | Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | Touch display panel, manufacturing method thereof, and touch display device |
| CN109669572B (en) * | 2018-12-14 | 2020-10-27 | 武汉华星光电半导体显示技术有限公司 | Touch display panel, manufacturing method thereof and touch display device |
| CN109889182B (en) * | 2018-12-26 | 2023-10-20 | 天津大学 | Flexible bulk acoustic wave filter |
| CN110007810B (en) * | 2019-03-21 | 2023-03-21 | 武汉华星光电半导体显示技术有限公司 | Touch screen, display module and electronic device |
| CN110888550A (en) * | 2019-11-11 | 2020-03-17 | 汕头超声显示器技术有限公司 | Flexible touch sensing device and manufacturing method thereof |
| CN110968221B (en) * | 2019-12-19 | 2023-07-25 | 京东方科技集团股份有限公司 | Touch panel and display device |
| CN113961104B (en) * | 2020-07-20 | 2023-11-03 | 禾瑞亚科技股份有限公司 | Flexible touch screen, touch processing device and method and electronic system |
| CN112162650B (en) * | 2020-08-12 | 2024-02-23 | 武汉天马微电子有限公司 | Touch panel and display device |
| CN117203604A (en) * | 2022-04-08 | 2023-12-08 | 京东方科技集团股份有限公司 | Touch layer and touch display device |
| WO2023236131A1 (en) * | 2022-06-09 | 2023-12-14 | Boe Technology Group Co., Ltd. | Touch display panel and display apparatus |
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