CN110058736B

CN110058736B - Flexible touch panel

Info

Publication number: CN110058736B
Application number: CN201910235776.4A
Authority: CN
Inventors: 陈碧
Original assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Current assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority date: 2019-03-27
Filing date: 2019-03-27
Publication date: 2022-05-17
Anticipated expiration: 2039-03-27
Also published as: CN110058736A

Abstract

The invention relates to a flexible touch panel, wherein the flexible touch panel comprises a substrate, an OLED packaging layer, a touch electrode metal layer and a touch packaging layer. According to the invention, the self-capacitance type touch electrode is manufactured on the flexible touch panel, the high-speed switch controller is added in the second area, the touch sensing signal leads are processed by the high-speed switch controller, and the number of the touch sensing signal leads led out to the touch bonding terminal is reduced under the condition that the number of the touch units is not changed, so that the position for displaying the bonding area is reserved, and the realization on an on cell is facilitated; therefore, the display bonding area and the touch bonding area are distinguished, the touch sensing signal lead and the display signal lead are prevented from being excessively concentrated, and signal interference is avoided.

Description

Flexible touch panel

Technical Field

The invention relates to the technical field of display, in particular to a flexible touch panel.

Background

The display device can convert the data of the computer into various characters, numbers, symbols or visual images for display, and can input commands or data into the computer by using input tools such as a keyboard, and the display contents can be added, deleted and changed at any time by means of hardware and software of the system. Display devices are classified into plasma, liquid crystal, light emitting diode, cathode ray tube, and the like, according to the display device used.

An Organic Light-Emitting Diode (OLED) display device is also called an Organic electroluminescent display device or an Organic Light-Emitting semiconductor. The basic structure of OLED is a sandwich structure composed of a thin and transparent Indium Tin Oxide (ITO) with semiconductor property connected to the positive electrode of power, and another metal cathode. The whole structure layer comprises a Hole Transport Layer (HTL), a light Emitting Layer (EL) and an Electron Transport Layer (ETL). When power is supplied to a proper voltage, positive holes and surface cathode charges are combined in the light-emitting layer and are recombined to form excitons (electron-hole pairs) in an excited state at a certain probability under the action of coulomb force, the excited state is unstable in a normal environment, the excitons in the excited state are recombined and transfer energy to the light-emitting material, so that the light-emitting material is transited from a ground state energy level to the excited state, the excited state energy generates photons through a radiation relaxation process, light energy is released, brightness is generated, and three primary colors of red, green and blue are generated according to different formulas to form basic colors.

First, the OLED is characterized by self-luminescence, unlike a TFT-LCD (Thin film transistor-liquid crystal display) device, which requires a backlight, and thus has high visibility and brightness. Secondly, the OLED has the advantages of low voltage requirement, high power saving efficiency, fast response, light weight, thin thickness, simple structure, low cost, wide viewing angle, almost infinite contrast, low power consumption, extremely high response speed, etc., has become one of the most important display technologies at present, is gradually replacing the TFT-LCD, and is expected to become the next generation of mainstream display technology following the LCD.

Currently, in the field of display panels, display panels with touch function have become more and more mainstream display products, and various integration modes of display panels and touch panels appear, such as embedded (in cell), external (on cell) and external (off cell). On the other hand, if the display panel with a touch function is classified in terms of operation principle, the display panel with a touch function can be roughly classified into a capacitive type, a resistive type, an infrared type, and the like. The capacitive touch display panel mainly comprises a self-capacitance type and a mutual capacitance type. The mutual capacitance type needs to adopt two layers of driving and sensing electrodes, such as a mutual capacitance structure in an oncell, and a bridging design needs to be completed at the overlapping position of the driving electrode and the sensing electrode, so that the process difficulty is high, and the structure is complex. The self-capacitance touch display panel is usually used for touch electrodes arranged inside an outer substrate of the display panel, so that the self-capacitance touch display panel is small in overall thickness and light and thin, and compared with the mutual capacitance structure, the number of touch sensing signal leads is too large, so that a display bonding position cannot be reserved after an oncell is designed, and the realization in the oncell is difficult. Therefore, a new flexible touch panel is needed to reduce the number of touch sensing signal leads of the self-capacitance touch electrode.

Disclosure of Invention

An object of the present invention is to provide a flexible touch panel capable of reducing the number of touch sensing signal leads of a self-capacitance type touch electrode.

In order to solve the above problem, an embodiment of the present invention provides a flexible touch panel, which defines a first area and a second area, wherein the first area is a display area, and includes: the OLED device comprises a substrate, an OLED packaging layer, a touch electrode metal layer and a touch packaging layer. Wherein the OLED packaging layer is arranged on the substrate; the touch electrode metal layer is arranged on the OLED packaging layer; the touch packaging layer is arranged on the touch electrode metal layer; the touch electrode metal layer at the first area position is provided with a touch unit, and the substrate at the second area position is provided with a high-speed switch controller and a touch bonding terminal; the touch unit is connected to the touch bonding terminal through a touch sensing signal lead wire through the high-speed switch controller.

Further wherein the second region comprises: the wire changing area, the bending area and the bonding area. The touch sensing signal lead is arranged at a position close to the first area, and the touch sensing signal lead is changed from a touch electrode metal layer to the substrate in the wire changing area; the bending area is arranged on one side of the wire changing area, which is far away from the first area; the bonding area is arranged on one side, away from the wire changing area, of the bending area, and the touch bonding terminal is arranged on a substrate of the bonding area; wherein the high speed switch controller is disposed on the substrate between the inflection region and the bonding region.

Furthermore, the bonding area of the substrate includes two touch bonding areas, the two touch bonding areas are respectively disposed at two ends of the bonding area of the substrate, and the touch bonding terminals are disposed on the substrate of the touch bonding area; the high-speed switch controller is arranged on the substrate between the touch bonding area and the bending area.

Further, the bonding area of the substrate further includes a display bonding area, and the display bonding area is disposed between the two touch bonding areas; and a display bonding terminal is arranged on the substrate of the display bonding area.

Further, a display driving chip is arranged on the substrate between the display bonding area and the bending area, and the display driving chip is connected to the display bonding terminal through a display signal lead.

Further, the high-speed switch controller is arranged in a 1-level structure mode, switches are arranged in the high-speed switch controller, and the number of the switches is 1/2 of the number of the touch units.

Further, the number of the touch sensing signal leads after passing through the high speed switch controller is reduced 1/2.

Further, the touch unit is connected to an input terminal of the switch of the high-speed switch controller through a touch sensing signal lead, and then an output terminal of the switch of the high-speed switch controller is connected to the touch bonding terminal.

Further, the input terminals of the switches of the high-speed switch controller each include: a first input terminal and a second input terminal. Wherein the first input terminal is connected to the switch output terminal through a PMOS; the second input end is connected to the switch output end through an NMOS.

Further, the high-speed switch controller is arranged in a 2-stage structure, a switch is arranged in the high-speed switch controller, and the high-speed switch controller includes: a first level high speed switch controller and a second level high speed switch controller. The number of switches in the first-level high-speed switch controller is 1/2 of the number of the touch units; the number of switches in the second-level high-speed switch controller is 1/4 of the number of the touch units.

Further, the number of the touch sensing signal leads is reduced 1/2 after passing through the first-level high-speed switch controller, and the number of the touch sensing signal leads is reduced 1/2 again after passing through the second-level high-speed switch controller.

Further, the touch unit is connected to an input end of the switch of the first-stage high-speed switch controller through a touch sensing signal lead, then an output end of the switch of the first-stage high-speed switch controller is connected to an input end of the switch of the second-stage high-speed switch controller, and then an output end of the switch of the second-stage high-speed switch controller is connected to the touch bonding terminal.

Further, the shape of the touch unit comprises one or more of a triangle, a rectangle and a diamond.

Further, the touch electrode metal layer is composed of one or more of gold, silver, copper, lithium, sodium, potassium, magnesium, titanium, aluminum, zinc, indium tin oxide, aluminum-doped zinc oxide and antimony-doped tin oxide.

The invention has the advantages that: the invention relates to a flexible touch panel.A self-capacitance touch electrode is manufactured on the flexible touch panel, a high-speed switch controller is added in a second area, a touch sensing signal lead is processed by the high-speed switch controller, and the number of the touch sensing signal leads led out to a touch bonding terminal is reduced under the condition that the number of touch units is not changed, so that the position for displaying a bonding area is reserved, and the realization on an on cell is facilitated; therefore, the display bonding area and the touch bonding area are distinguished, the touch sensing signal lead and the display signal lead are prevented from being excessively concentrated, and signal interference is avoided.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a flexible touch panel according to a first embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a flexible touch panel according to a second embodiment of the present invention.

Fig. 3 is a partial schematic view of a second structural schematic view of the flexible touch panel according to the present invention.

Fig. 4 is a schematic structural diagram of a flexible touch display panel in a second area according to the present invention.

Fig. 5 is a schematic diagram of the switch structure in the high-speed switch controller of the present invention.

The components in the figure are identified as follows:

100 flexible touch panel

101. A first region 102 and a second region

1021. Line changing region 1022, bending region

1023. Bonding area 10231 and touch-control bonding area

10232. Displaying a bonding area

1. Substrate 2 and OLED packaging layer

3. Touch electrode metal layer 4 and touch packaging layer

5. Substrate 6, insulating layer

7. Metal wiring layer

31. Touch unit 32 and touch sensing signal lead

11. High-speed switch controller 12 and touch bonding terminal

13. Display driving chip 14 and display bonding terminal

15. Display signal lead 111, switch

1111、PMOS 1112、NMOS

Detailed Description

The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, is provided to fully explain the technical contents of the present invention to those skilled in the art, by way of example, to demonstrate that the present invention may be practiced and to make apparent to those skilled in the art how the present invention may be embodied. The present invention may, however, be embodied in many different forms of embodiment, and the scope of the present invention should not be construed as limited to the embodiment set forth herein, but rather construed as being limited only by the following description of the embodiment.

The directional terms used in the present invention, such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", etc., are only directions in the drawings, and are used for explaining and explaining the present invention, but not for limiting the scope of the present invention.

In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. In addition, the size and thickness of each component shown in the drawings are arbitrarily illustrated for convenience of understanding and description, and the present invention is not limited to the size and thickness of each component.

When certain components are described as being "on" another component, the component can be directly on the other component; there may also be an intermediate component disposed on the intermediate component and the intermediate component disposed on another component. When an element is referred to as being "mounted to" or "connected to" another element, they are directly "mounted to" or "connected to" the other element or "mounted to" or "connected to" the other element through an intermediate element.

Examples

As shown in fig. 1, a flexible touch panel 100 is defined with a first area 101 and a second area 102, wherein the first area 101 is a display area. Wherein the flexible touch panel 100 includes: the OLED display panel comprises a substrate 1, an OLED packaging layer 2, a touch electrode metal layer 3 and a touch packaging layer 4. Wherein the OLED encapsulation layer 2 is arranged on the substrate 1; the touch electrode metal layer 3 is arranged on the OLED packaging layer 2; the touch encapsulation layer 4 is disposed on the touch electrode metal layer 3.

As shown in fig. 2, a touch unit 31 is disposed on the touch electrode metal layer 3 at the position of the first area 101, and a high speed switch controller 11 and a touch bonding terminal 12 are disposed on the substrate 1 at the position of the second area 102; wherein the touch unit 31 is connected to the touch bonding terminal 12 through the high speed switch controller 11 via a touch sensing signal lead 32.

Specifically, the shape of the touch unit 31 may be one or more of a triangle, a rectangle, and a diamond. In this embodiment, the touch unit 31 is square.

As shown in fig. 3, the second region 102 includes: a wire changing area 1021, a bending area 1022, and a bonding area 1023.

As shown in fig. 3 and 4, wherein the wire changing area 1021 is disposed at a position close to the first area 101, and the touch sensing signal lead 32 is changed from the touch electrode metal layer 3 to the substrate 1 in the wire changing area 1021. Specifically, the substrate 1 includes a substrate 5, an insulating layer 6 and a metal wiring layer 7, and the touch sensing signal lead 32 is connected to the metal wiring layer 7 in a wire-changing manner. The bending region 1022 is disposed on a side of the wire changing region 1021 away from the first region 101; the bonding area 1023 is arranged on one side of the bending area 1022 far away from the wire changing area 1021, and the touch bonding terminal 12 is arranged on the substrate 1 of the bonding area 1023; wherein the high speed switch controller 11 is disposed on the substrate 1 between the inflection region 1022 and the bonding region 1023.

As shown in fig. 3, wherein the bonding area 1023 of the substrate 1 includes two touch bonding areas 10231, the two touch bonding areas 10231 are respectively disposed at two ends of the bonding area 1023 of the substrate 1, and the touch bonding terminals 12 are disposed on the substrate 1 of the touch bonding area 10231; the high speed switch controller 11 is disposed on the substrate 1 between the touch bonding area 10231 and the bending area 1022.

As shown in FIG. 3, wherein bonding area 1023 of substrate 1 further comprises a display bonding area 10232, said display bonding area 10232 is disposed between two touch-sensitive bonding areas 10231; wherein display bonding terminal 14 is disposed on substrate 1 of display bonding area 10232.

As shown in fig. 3, a display driver chip 13 is disposed on the substrate 1 between the display bonding area 10232 and the bending area 1022, and the display driver chip 13 is connected to the display bonding terminal 14 through a display signal lead 15.

The high-speed switch controller 11 may be configured in a 1-stage structure, specifically, the touch unit 31 is connected to an input end of the switch 111 of the high-speed switch controller 11 through a touch sensing signal lead 32, and then an output end of the switch 111 of the high-speed switch controller 11 is connected to the touch bonding terminal 12.

As shown in fig. 5, a switch 111 is disposed in the high-speed switch controller 11, wherein the input terminals of the switch 111 of the high-speed switch controller 11 each include: a first input terminal and a second input terminal. Wherein the first input terminal is connected to the output terminal of the switch 111 through PMOS 1111; the second input terminal is connected to the output terminal of the switch 111 through NMOS 1112. Specifically, when a high level is input, the PMOS 1111 of the switch 111 is turned on, and the NMOS 1112 is turned off; when a low level is input, the PMOS 1111 of the switches 111 is turned off, and the NMOS 1112 is turned on, where the number of the switches 111 is 1/2 that is the number of the touch units 31.

Accordingly, the number of the touch sensing signal leads 32 passing through the high speed switch controller 11 is reduced 1/2.

As shown in fig. 3 and 4, the high-speed switch controller 11 may be configured in a 2-stage or more configuration, and the present embodiment describes the high-speed switch controller 11 in detail in a 2-stage configuration. Wherein the high speed switch controller 11 includes: a first level high speed switch controller and a second level high speed switch controller.

The touch unit 31 is connected to the input terminal of the switch 111 of the first-stage high-speed switch controller through the touch sensing signal lead 32, then the output terminal of the switch 111 of the first-stage high-speed switch controller is connected to the input terminal of the switch 111 of the second-stage high-speed switch controller, and then the output terminal of the switch 111 of the second-stage high-speed switch controller is connected to the touch bonding terminal 12.

As shown in fig. 5, a switch 111 is disposed in the high-speed switch controller 11, wherein the input terminals of the switch 111 of the high-speed switch controller 11 each include: a first input terminal and a second input terminal. Wherein the first input terminal is connected to the output terminal of the switch 111 through PMOS 1111; the second input terminal is connected to the output terminal of the switch 111 through NMOS 1112. Specifically, when a high level is input, the PMOS 1111 of the switch 111 is turned on, and the NMOS 1112 is turned off; when a low level is input, the PMOS 1111 of the switches 111 is turned off, and the NMOS 1112 is turned on, so that the number of switches 111 in the first-level high-speed switch controller is 1/2 equal to the number of touch units 31; the number of the switches 111 in the second-level high-speed switch controller is 1/4 of the number of the touch units 31.

Accordingly, the number of the touch sensing signal leads 32 passing through the first-stage high-speed switch controller is reduced 1/2, and the number of the touch sensing signal leads 32 passing through the second-stage high-speed switch controller is reduced 1/2 again.

Further, the touch electrode metal layer 3 is made of one or more of gold, silver, copper, lithium, sodium, potassium, magnesium, titanium, aluminum, zinc, indium tin oxide, aluminum-doped zinc oxide, and antimony-doped tin oxide. The touch electrode metal layer 3 made of the material has good conductive performance, touch reaction efficiency can be improved, and customer experience is improved.

In summary, in the present embodiment, under the condition that the number of the touch units 31 is not changed, the number of the touch sensing signal leads 32 led out to the touch bonding terminals 12 is reduced, so that the position of the display bonding area 1022 is reserved, which is convenient to implement on an cell, and therefore the display bonding area 1022 and the touch bonding area 1021 are separated, so that the touch sensing signal leads 32 and the display signal leads 15 are prevented from being excessively concentrated, and signal interference is avoided.

Wherein the OLED encapsulation layer 2 may be an organic layer, an inorganic layer, or a combination of organic and inorganic layers. The OLED packaging layer 2 made of the material has good insulativity, the water and oxygen resistance performance of the OLED packaging layer is improved, and the safety factor of use is improved.

Wherein the touch encapsulation layer 4 may be an organic layer, an inorganic layer, or a combination of an organic layer and an inorganic layer. The OLED packaging layer 2 made of the material has good insulativity, the water and oxygen resistance performance of the OLED packaging layer is improved, and the safety factor of use is improved.

The flexible touch panel provided by the invention is described in detail above. It should be understood that the exemplary embodiments described herein should be considered merely illustrative for facilitating understanding of the method of the present invention and its core ideas, and not restrictive. Descriptions of features or aspects in each exemplary embodiment should generally be considered as applicable to similar features or aspects in other exemplary embodiments. While the present invention has been described with reference to exemplary embodiments, various changes and modifications may be suggested to one skilled in the art. It is intended that the present invention cover the modifications and variations of this invention provided they come within the spirit and scope of the appended claims and their equivalents and improvements made thereto.

Claims

1. A flexible touch panel is defined with a first area and a second area, wherein the first area is a display area, and the flexible touch panel is characterized by comprising:

a substrate;

the OLED packaging layer is arranged on the substrate;

the touch electrode metal layer is arranged on the OLED packaging layer; and

the touch packaging layer is arranged on the touch electrode metal layer;

the touch electrode metal layer at the first area position is provided with a touch unit, and the substrate at the second area position is provided with a high-speed switch controller and a touch bonding terminal; the touch unit is connected to the touch bonding terminal through a touch sensing signal lead wire through the high-speed switch controller; the high-speed switch controller is arranged in a 1-level structure mode, switches are arranged in the high-speed switch controller, and the number of the switches is 1/2 of the number of the touch units; the touch sense signal leads are reduced in number 1/2 after passing through the high speed switch controller.

2. The flexible touch panel of claim 1, wherein the second area comprises: the touch sensing signal lead is arranged at a position close to the first area, and the touch sensing signal lead is changed from a touch electrode metal layer to the substrate in the wire changing area;

the bending area is arranged on one side, far away from the first area, of the wire changing area; and

the bonding area is arranged on one side, away from the wire changing area, of the bending area, and the touch bonding terminal is arranged on a substrate of the bonding area;

wherein the high speed switch controller is disposed on the substrate between the inflection region and the bonding region.

3. The flexible touch panel according to claim 2, wherein the bonding area of the substrate includes two touch bonding areas, the two touch bonding areas are respectively disposed at two ends of the bonding area of the substrate, and the touch bonding terminals are disposed on the substrate of the touch bonding areas; the high-speed switch controller is arranged on the substrate between the touch bonding area and the bending area.

4. The flexible touch panel of claim 3, wherein the bonding area of the substrate further comprises a display bonding area, the display bonding area being disposed between the two touch bonding areas;

and a display bonding terminal is arranged on the substrate of the display bonding area.

5. The flexible touch panel of claim 4, wherein a display driver chip is disposed on the substrate between the display bonding area and the bending area, and the display driver chip is connected to the display bonding terminals through display signal leads.

6. The flexible touch panel of claim 1, wherein the touch unit is connected to an input of a switch of the high speed switch controller by a touch sense signal lead, and then an output of the switch of the high speed switch controller is connected to the touch bonding terminal.

7. The flexible touch panel of claim 6, wherein the inputs of the switches of the high-speed switch controller each comprise:

a first input terminal connected to the switch output terminal through a PMOS; and

a second input terminal connected to the switch output terminal through an NMOS.

8. The flexible touch panel according to claim 1, wherein the high speed switch controller is configured in a 2-stage structure, and a switch is disposed in the high speed switch controller, wherein the high speed switch controller comprises:

a first-stage high-speed switch controller, wherein the number of switches in the first-stage high-speed switch controller is 1/2 of the number of touch units; and

and a second-stage high-speed switch controller, wherein the number of switches in the second-stage high-speed switch controller is 1/4 of the number of the touch units.

9. The flexible touch panel of claim 8, wherein the touch sense signal leads are reduced in number 1/2 after passing through a first level high speed switch controller, and the touch sense signal leads are reduced in number 1/2 again after passing through a second level high speed switch controller.

10. The flexible touch panel of claim 8, wherein the touch unit is connected to an input of the switch of the first high-speed switch controller via a touch sensing signal lead, then an output of the switch of the first high-speed switch controller is connected to an input of the switch of the second high-speed switch controller, and then an output of the switch of the second high-speed switch controller is connected to a touch bonding terminal.

11. The flexible touch panel of claim 1, wherein the touch cells have a shape comprising one or more of a triangle, a rectangle, and a diamond.

12. The flexible touch panel of claim 1, wherein the touch electrode metal layer is comprised of one or more of gold, silver, copper, lithium, sodium, potassium, magnesium, titanium, aluminum, zinc, indium tin oxide, aluminum-doped zinc oxide, and antimony-doped tin oxide.