Composite optical film for AMOLED display panel

Abstract

The embodiment of the invention provides a composite optical film for an AMOLED display panel. The composite optical film comprises a blocking layer and a moisture absorption layer, wherein the blocking layer is used for blocking water vapor or air; the moisture absorption layer comprises a porous substrate and a filling layer, the porous substrate comprises a first surface and a second surface opposite to the first surface, the first surface is provided with the blocking layer, the second surface is provided with concave holes distributed in an array mode, and the concave holes are filled with the filling layer; the filling layer is made of an organic-inorganic hybrid polymer transparent gel material with moisture absorption performance, and the gel material expands after absorbing moisture and protrudes from the second surface to form a micro-lens array. According to the composite optical film, the capacity of blocking water vapor and oxygen for a long time is provided for the display panel, and meanwhile the defect of low light-emitting efficiency caused by degradation of a light-emitting layer in an OLED light-emitting device can be overcome as time goes on.

Description

technical field [0001] The embodiments of the present application relate to a composite optical film, in particular to a composite optical film used for an AMOLED display panel. Background technique [0002] Active-Matrix Organic Light-Emitting Diode (AMOLED) is also called organic electroluminescent display and organic light-emitting semiconductor. Compared with traditional LCD, OLED does not need a backlight, and the organic material can emit light when the current passes through the organic functional layer, which greatly reduces the thickness and energy consumption of the display screen. Due to the advantages of self-illumination, wide viewing angle, high contrast ratio, low power consumption, and flexible display, OLED has been applied to new-generation mobile phone screens, computer monitors, full-color TVs and other fields, and has received extensive attention. [0003] At present, organic electroluminescent devices are mostly prepared on rigid substrates, and flexib...

AI Technical Summary

Problems solved by technology

However, due to the fact that a large amount of organic materials contained in OLED devices are easily eroded by water vapor and oxygen in the air, and the nature of the organic light-emitting layer is not resistant to high voltage, the current AMOLED display panels have the defects of low lifespan and poor luminous efficiency. Seriously restricting the advancement of AMOLED display panels to the field of high-performance display panels

[0004] The current encapsulation methods used in this field cannot well solve the problem that water vapor and oxygen penetrate into the interior of the device and cause corrosion of the organic layer and metal layer, especially with the prolongation of use time, water vapor and oxygen tend to pass through the thin film of the encapsulation layer Cracks penetrate into the device, causing the organic light-emitting layer to gradually deteriorate, which in turn leads to a gradual decline in the light-emitting performance of the light-emitting layer over time, and even black spots appear in some pixels. Compared with the display panel used in the early stage, the display effect is consistent. Significant difference in gender

In order to solve the problem of poor luminous efficiency, various methods have been proposed to improve the external quantum efficiency of light-emitting devices. However, these methods are accompanied by the introduction of additional optical films, which increases the process and is not conducive to the flexibility of the display panel.

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