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OLED display panel

A display panel and substrate technology, which is applied in the field of OLED display panels, can solve problems such as failure of organic film packaging, and achieve the effects of improving film forming precision, prolonging service life, and improving flow

Active Publication Date: 2021-04-23
WUHAN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides an OLED display panel to solve the technical problem that in the existing packaging process, the organic polymer may diffuse across the retaining wall, resulting in packaging failure after the organic film contacts the outside world

Method used

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  • OLED display panel
  • OLED display panel
  • OLED display panel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Such as figure 1 As shown, an OLED display panel includes a substrate 110 and a flat layer 120 formed on the surface of the substrate 110; the surface of the flat layer 120 is provided with a light emitting region 150, and a luminescent material is arranged in the light emitting region 150; The edge of the layer 120 is provided with a dam 130 around the light-emitting region 150, and the surface of the flat layer 120, the surface of the light-emitting region 150, and the surface of the dam 130 together constitute an encapsulation region; Film-forming area 140; an annular ditch 160 is opened in the film-forming area 140, the ditch 160 surrounds the light-emitting area 150, and the overall shape of the ditch 160 can be circular, elliptical, or polygonal .

[0035] When performing thin film encapsulation, the organic polymer is printed in the film forming area 140 . When printing organic polymers, the organic polymers are generally diffused from the light-emitting area 1...

Embodiment 2

[0058] Such as Figure 5 with Image 6 As shown, at least one trench 160 is provided, and the trenches 160 are arranged in sequence along a direction away from the light emitting region 150 . When the organic polymer diffuses from the middle of the film-forming area 140 to the surroundings, multiple interception and diversion are carried out through the multiple channels 160 arranged at intervals, so as to slow down the diffusion speed of the organic polymer and achieve better diversion and dredging. There is an opportunity for the polymer to cover the film-forming region 140 more uniformly, improving film-forming precision.

[0059] In specific implementation, the number of ditches 160 can be selected according to the actual distance between the embankment 130 and the light-emitting area 150 and the width of the opening of the ditches 160, so as to meet specific production needs while ensuring anti-overflow.

[0060] Among them, the ditch 160 with the largest distance from ...

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Abstract

The present invention provides an OLED display panel. The OLED display panel includes a substrate, a flat layer arranged on the surface of the substrate, a light-emitting area arranged on the surface of the flat layer, and an The embankment of the light-emitting area; wherein, an annular ditch is opened on the flat layer inside the embankment, and the ditch surrounds the light-emitting area. Beneficial effects: by setting ditches in the film-forming area, during thin-film encapsulation, the abnormally diffused organic polymer will flow along the ditch to the position where abnormal diffusion does not occur through the diversion effect of the ditches, effectively avoiding the overflow of organic polymers when they are leveled. Possibility, preventing packaging failure after the organic film contacts with the outside world, and effectively improving the flow of organic polymers in the film-forming area in thin-film packaging, improving the film-forming precision, thereby greatly improving the effect of thin-film packaging and prolonging the lifetime of organic light-emitting devices. service life.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an OLED display panel. Background technique [0002] Organic Light-Emitting Diode (OLED) has all solid-state, active light-emitting, high brightness, high contrast, ultra-thin and ultra-light, low cost, low power consumption, no viewing angle limitation, wide operating temperature range, etc. Excellent characteristics, and can be fabricated on a flexible substrate to achieve flexible display, so it is recognized as the most promising next-generation lighting and display technology. However, the light-emitting materials used in OLED displays are extremely sensitive to water and oxygen, resulting in a shortened service life. In order to better develop flexible OLED display technology, thin-film packaging technology adapted to the development of OLED technology came into being. [0003] At present, mature thin film packaging structures are formed by alternate deposition of inorga...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/52
CPCH10K50/841H10K50/84
Inventor 朱三
Owner WUHAN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD