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Flexible OLED display panel

A display panel, flexible technology, applied in photovoltaic power generation, electrical components, circuits, etc., can solve the problems of barrier layer cracking, easy formation of aluminum salt, affecting the packaging effect, etc., to extend the path of water and oxygen intrusion, enhance the roll The effect of starting and enhancing the encapsulation effect

Active Publication Date: 2016-01-20
EVERDISPLAY OPTRONICS (SHANGHAI) CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally deposited 50nm film, its water vapor transmission rate (WVTR) can reach 103g / m 2 .24h, but the atomic deposition coating (ALD) has a serious coating diffusion effect. If it cannot be effectively blocked, it will directly contact water vapor, have a weak chemical reaction with water, and easily form aluminum salts
Furthermore, the water and oxygen barrier ability of the periphery of the OLED device is weakened, which affects the encapsulation effect of the flexible OLED display panel
[0004] In the prior art, a continuous bar-shaped barrier layer is usually used to block the diffusion effect of atomic deposition coating (ALD), but in the process of developing flexible OLED display technology, when the flexible OLED display panel is rolled , the bending stress of the barrier layer is different at different positions, and in the region with a large degree of bending, the barrier layer is prone to detachment, which affects the packaging effect

Method used

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Examples

Experimental program
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Effect test

no. 1 example

[0032] Please also see Figure 1 to Figure 3 , which respectively show the front view of the flexible OLED display panel of the first embodiment of the present invention, a schematic view of the longitudinal section structure, and a schematic view of the structure of the barrier layer. Among them, in order to clearly show the structure of the flexible OLED display panel, figure 1 The second encapsulation layer is omitted in , and the structure of the second encapsulation layer can be found in figure 2 . Such as figure 1 and figure 2 As shown, in the preferred embodiment of the present invention, the flexible OLED display panel includes: a flexible substrate 1 , an OLED device 2 , a first encapsulation layer 3 , a barrier layer 4 and a second encapsulation layer 5 .

[0033] Such as figure 2 As shown, the OLED device 2 is disposed on a flexible substrate 1 . The OLED device 2 at least includes a thin film transistor driving layer, an anode, a light emitting layer and a...

no. 2 example

[0042] See Figure 4 , which shows a schematic structural view of the barrier layer of the flexible OLED display panel according to the second embodiment of the present invention. with the above image 3 The difference from the first embodiment shown is that the barrier layer 4 is a rectangular overlapping structure. Specifically, with Figure 4 For example, in Figure 4 In the microscopic top view shown, the first blocking unit 41' is strip-shaped, while the second blocking unit 42' is U-shaped, and the two ends of each U-shaped second blocking unit 42' overlap two adjacent The first blocking unit 41'. The barrier layer shown in this embodiment can also have similar effects to that of the above-mentioned first embodiment, which will not be repeated here.

no. 3 example

[0044] See Figure 5 , which shows a schematic structural view of the barrier layer of the flexible OLED display panel according to the third embodiment of the present invention. with the above image 3 The difference from the first embodiment shown is that the barrier layer 4 is a U-shaped fastening structure. Specifically, with Figure 5 For example, in Figure 5 In the micro top view shown, both the first blocking unit 41 ″ and the second blocking unit 42 ″ are U-shaped. Wherein, the U-shaped first blocking unit 41 ″ is arranged opposite to the second blocking unit 42 ″. Such as Figure 5 As shown, the relative arrangement means that the orientations of the U-shaped openings are opposite. The barrier layer shown in this embodiment can also have similar effects to that of the above-mentioned first embodiment, which will not be repeated here.

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Abstract

The invention discloses a flexible OLED display panel, which comprises a flexible substrate, an OELD device, a first encapsulation layer, a barrier layer and a second encapsulation layer, wherein the OLED device is arranged on the flexible substrate; the first encapsulation layer is arranged on the flexile substrate and covers the OLED device; the barrier layer is arranged on the flexible substrate, surrounds the periphery of the first encapsulation layer, and comprises a plurality of discontinuous barrier units; the plurality of barrier units are arranged in a chain form; and the second encapsulation layer is arranged on the flexible substrate and covers the first encapsulation material and the barrier layer. The flexible OLED display panel is capable of effectively blocking the diffusion effect of atomic deposition coating and enhancing the water blocking capacity of a thin-film encapsulation on the periphery of the flexible OLED display panel; meanwhile, the reelability of the barrier layer is increased; the development requirement of the flexible OLED display panel is relatively well met; and an important idea is also provided for development of the flexible OLED display panel.

Description

technical field [0001] The invention relates to the field of semiconductor devices, in particular to a flexible OLED display panel. Background technique [0002] Compared with many displays, OLED display panels have many advantages such as active light emission, high contrast ratio, and no viewing angle limitation, especially flexible OLED display panels, which have more obvious advantages. The flexible OLED display panel is not only thinner and lighter in size, but also lower in power consumption than the original device, which helps to improve the battery life of the device. At the same time, based on its bendable and flexible characteristics, its durability is also much higher than before. screen, reducing the probability of accidental damage to equipment. Therefore, flexible OLED display panels have been widely used in the field of display technology and will become the mainstream of OLED display consumption in the future. However, the lifetime of OLED elements in flex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/52H10K99/00
CPCH10K59/8731H10K59/871H10K59/8722Y02E10/549H10K2102/311H10K77/111H10K2102/00H10K50/844
Inventor 江欢何信儒
Owner EVERDISPLAY OPTRONICS (SHANGHAI) CO LTD
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