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Organic electroluminescent device and preparation method thereof, and flexible display device

An electroluminescent device and a luminescent technology, applied in the direction of electric solid-state devices, semiconductor/solid-state device manufacturing, electrical components, etc., can solve the problems of cover plate breakage, cover plate and packaging layer falling off, etc., to avoid falling off and avoid occurrence Effects of breaking and prolonging service life

Active Publication Date: 2019-02-05
GUANGZHOU GOVISIONOX TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides an organic electroluminescent device, a preparation method thereof, and a flexible display device, so as to solve the peeling phenomenon of the cover plate and the packaging layer caused by the separation between the cover plate and the optical adhesive layer after the flexible display device is bent multiple times. Even the unfavorable phenomenon of the cover plate breaking, prolonging the service life of the flexible display device

Method used

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  • Organic electroluminescent device and preparation method thereof, and flexible display device
  • Organic electroluminescent device and preparation method thereof, and flexible display device
  • Organic electroluminescent device and preparation method thereof, and flexible display device

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Experimental program
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Embodiment 1

[0057] Figure 1a It is a top view of an implementation manner of the first patterned structure of the adhesive layer in the embodiment of the present invention; Figure 1b It is a top view of an implementation manner of the second patterned structure of the cover plate in the embodiment of the present invention; figure 2 for Figure 1a Schematic diagram of the cross-sectional structure of the organic electroluminescent device in Part A-A.

[0058] The inventors of the present invention found in the actual research and development process that when the organic electroluminescent device 100 is bent, the separation or peeling between the encapsulation layer 130 and the cover plate 150 generally occurs between the adhesive layer 140 and the cover plate 150, The main reason is that the encapsulation layer 130 is usually composed of inorganic layers and organic layers alternately, and the elastic modulus of the encapsulation layer 130 is greater than that of the cover plate 150. T...

Embodiment 2

[0084] This embodiment provides a flexible display device, which can be OLED display devices and any products with display functions such as TVs, digital cameras, mobile phones, tablet computers, smart watches, e-books, and navigators that include OLED display devices. or parts.

[0085] see Figure 1a , 1b as well as figure 2 , the flexible display device includes: the organic electroluminescent device 100 in the first embodiment. Wherein, the structure, function and implementation of the organic electroluminescent device 100 may be the same as those in the first embodiment, and will not be repeated here.

[0086] The flexible display device provided in this embodiment includes the organic electroluminescent device 100, and the encapsulation layer 130 and the cover plate 150 are bonded together by setting an adhesive layer 140 between the encapsulation layer 130 and the cover plate 150. , and the surface of the adhesive layer 140 facing the cover plate 150 has a first pat...

Embodiment 3

[0088] Figure 6 It is a flow chart of making the organic electroluminescent device in the embodiment of the present invention, such as Figure 6 As shown, the production method includes the following steps:

[0089] S101: Provide a cover plate, a fiber layer, and a flexible substrate provided with an OLED display device.

[0090] Wherein, the flexible substrate is used to carry other elements in the organic electroluminescent device, the cover plate is used to encapsulate other elements in the organic electroluminescent device, and the OLED display device is between the flexible substrate and the cover plate and is in contact with the flexible substrate.

[0091] S102: forming an encapsulation layer covering the OLED display device.

[0092] An encapsulation layer is formed on the OLED display device, for example, by printing or vapor deposition.

[0093] S103: Form an adhesive layer bonded on the surface of the encapsulation layer facing away from the flexible substrate. ...

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Abstract

The invention provides an organic electroluminescent device and a preparation method thereof, and a flexible display device. The organic electroluminescent device includes a flexible substrate, an OLED display device arranged on the flexible substrate, an encapsulated layer covering the OLED display device, a bonding layer bonding on the face, away from the flexible substrate, of the encapsulatedlayer, a cover plate bonding on the face, away from the flexible substrate, of the bonding layer, and a fibrous layer arranged between the bonding layer and the cover plate; the face, facing to the cover plate, of the bonding layer has a first patterned structure; the face, facing to the bonding layer, of the cover plate has a second patterned structure fitting with the first patterned structure;and at least partial areas of the fibrous layer is fitted between the first patterned structure and the second patterned structure. Thus, the shedding of the cover plate and the encapsulated layer after the flexible display device is bended for many times can be solved, even the adverse phenomenon of cover plate fracture, and the service life of the flexible display device can be prolonged.

Description

technical field [0001] The invention relates to an organic electroluminescent device, a preparation method thereof, and a flexible display device, belonging to the technical field of flexible display. Background technique [0002] Organic Light-Emitting Diode (OLED) has excellent performances such as low power consumption, high color saturation, wide viewing angle, thin thickness, and flexibility. Especially the flexible performance makes it widely used in flexible display devices such as terminal equipment and wearable equipment. [0003] Existing flexible display devices usually include an array substrate, an anode layer, a pixel definition layer, a cathode layer, a light extraction layer (Capping Layer, referred to as CPL), an encapsulation layer, and a cover plate that are stacked in sequence, wherein the cover plate passes through the optical glue layer. It is connected with the encapsulation layer to ensure its water and oxygen barrier performance. [0004] However, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/52H01L51/56
CPCH10K50/8426H10K71/00
Inventor 李蒙蒙葛泳许东升
Owner GUANGZHOU GOVISIONOX TECH CO LTD
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