Flexible stretchable OLED display touch screen device and manufacturing method thereof

A display touch and flexible technology, applied in the OLED field, can solve the problems of touch unit control signal and display control signal overlapping crosstalk, reduce the light transmittance of OLED devices, and break the insulating inorganic layer, so as to eliminate signal crosstalk and facilitate Touch detection, large deformation effect

Active Publication Date: 2020-02-28
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One problem with the capacitive touch structure of the above-mentioned OLED screen is that both the touch control unit and the display unit are set on the island, and there will be crosstalk caused by overlapping of the touch unit control signal and the display control signal. Layers of inorganic materials will further reduce the light transmittance of OLED devices
Another problem is that the stretchable amount of the first inorganic insulating layer 5 and the second inorganic insulating layer 7 is less than 7 / 1000, if the stretching amount of the screen is greater than 7 / 1000, the insulating inorganic layer will break and cause touch Structural failure, so it cannot be directly applied to stretchable OLED screens

Method used

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  • Flexible stretchable OLED display touch screen device and manufacturing method thereof
  • Flexible stretchable OLED display touch screen device and manufacturing method thereof
  • Flexible stretchable OLED display touch screen device and manufacturing method thereof

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Experimental program
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Effect test

Embodiment 1

[0047] See attached Figure 4 , shows the flexible and stretchable OLED display touch screen device of Embodiment 1 of the present invention, in which the first electrode 2 and the first electrode wire 2-1 are fabricated on the stretchable substrate 1, and then the entire surface of the stretchable substrate 1 Attach OCA glue5. Among them, the stretchable substrate 1 can be made of PDMS, SEBS, Ecoflex and other materials; the first electrode can be made of nano-silver wire, carbon nanotubes, graphene and other materials, and can be realized by inkjet printing, flexographic printing, nanoimprinting and other processes. Graphical, OCA glue 5 can choose acrylic resin material. Because the material of the electrode and the electrode wire has extremely high stretchability (>30%), it does not need to be designed into an island shape.

[0048] Wherein the island-shaped display area 31 comprises a second substrate 7 (preferably material is polyimide PI) above the OCA glue, a buffer ...

Embodiment 2

[0054] Such as Figure 6-7 As shown, the flexible and stretchable OLED display touch screen device of Embodiment 2 of the present invention is shown. The main difference between it and Embodiment 1 is that each first electrode 2 includes mutually insulated first sub-electrodes 2-1 And the second sub-electrode 2-2, wherein, the first sub-electrode 2-1, the second electrode 12 and the insulating dielectric layer constitute the first sub-capacitor, the second sub-electrode 2-2, the second electrode 12 and the insulating dielectric layer The layer constitutes a second sub-capacitance, and the first sub-capacitance and the second sub-capacitance are respectively used to identify two coordinate positions in mutually perpendicular directions of the island-shaped display region 31 .

[0055] Among them, a plurality of first sub-electrodes 2-1 of each row of touch-sensing areas 34 are connected to each other through first sub-electrode wires 2-10, and a plurality of second sub-electrod...

Embodiment 3

[0062] Embodiment 3 shows the manufacturing method of the flexible and stretchable OLED display touch screen device of the present invention, and the cross-sectional view of the manufacturing process is as follows Figure 10 to Figure 11-6 As shown, in order to distinguish it from the traditional flexible LTPS manufacturing process, how to make the hollow area will be introduced in detail step by step, and other processes that are the same as the traditional flexible LTPS manufacturing process will not be repeated.

[0063] Firstly, a flexible second substrate 7 is made on a glass substrate, and then an inorganic buffer layer 8 of SiO2 and SiNx is deposited thereon, an active layer 9 is made on the buffer layer 8, and then patterned. Then, a gate insulating layer 10 is disposed on the active layer 9 , and a gate 11 is disposed on the gate insulating layer 10 . An interlayer dielectric layer 13 is arranged above the gate 11, and a source-drain electrode 14 is arranged thereon t...

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Abstract

The invention relates to a flexible stretchable OLED display touch screen device and a manufacturing method thereof. The touch screen device comprises a stretchable substrate, and an island-shaped display area, a flexible connection unit and a touch sensing area which are arranged on the stretchable substrate. The plurality of island-shaped display areas are arranged in an array form. The touch sensing areas are arranged among the plurality of island display areas in an array form. The touch sensing areas are in one-to-one correspondence with the island display areas, the touch sensing areas are connected with the four surrounding island display areas through flexible units or the adjacent island-shaped display areas are connected through flexible connecting units, and the touch sensing areas are connected with at least two surrounding island display areas through flexible units. The capacitive touch sensor is arranged in the hollow area capable of being displayed in a stretching mode,an island-shaped display area is avoided, and therefore the problem that the capacitive touch sensor is located above an OLED, and consequently the light-emitting brightness of the OLED is lost is solved. Meanwhile, the island-shaped display area signal and the touch screen capacitor are not overlapped up and down, so that the problem of signal crosstalk of the island-shaped display area signal and the touch screen capacitor is eliminated.

Description

technical field [0001] The present application relates to the field of OLEDs, in particular to touch screen technology for OLED stretchable displays, and more particularly to a flexible and stretchable OLED display touch screen device and a manufacturing method thereof. Background technique [0002] AMOLED (Active Matrix Organic Light-Emitting Diode) has the advantages of self-luminescence, ultra-thin, fast response, wide viewing angle, and low power consumption. At the same time, compared with liquid crystal displays, OLED can be bent and has a wider range of applications. After several years of technology accumulation, the development of OLED has gradually developed from the current curved product form to foldable and even stretchable products. The existing stretchable display technology scheme is a rigid display area and an elastic wire area connected to the rigid display area. The rigid display area does not bear the amount of stretching deformation, and the elastic wire...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/044
CPCG06F3/044Y02E10/549
Inventor 孙中元薛金祥隋凯袁广才李昌峰
Owner BOE TECH GRP CO LTD
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