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Light extraction film for OLED illumination device and manufacturing method thereof

A technology for light extraction films and lighting devices, which is applied in the manufacture of semiconductor/solid-state devices, electric solid-state devices, semiconductor devices, etc., can solve the problems of cumbersome preparation process, unfavorable mass production, complex structure of light extraction films, etc., and achieve uniform light. , to avoid the reduction of light extraction efficiency and the effect of reducing glare

Inactive Publication Date: 2018-11-27
CHINA LUCKY FILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These literatures have made some progress in the light extraction efficiency of OLED light-emitting devices, but these light extraction films have complex structures and cumbersome preparation processes, which are not conducive to large-scale production.

Method used

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  • Light extraction film for OLED illumination device and manufacturing method thereof
  • Light extraction film for OLED illumination device and manufacturing method thereof
  • Light extraction film for OLED illumination device and manufacturing method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0038] 2. For the preparation of the high refractive index concave-convex coating 16 coating liquid, select a thermosetting resin or a photocurable prepolymer as the film-forming resin component of the concave-convex layer, select a solvent or an active monomer as a diluent, and select nanoparticles 22 It is dispersed in the film-forming material resin, and the refractive index of the coating after film formation is adjusted by the nanoparticles and the film-forming resin to not be lower than the refractive index of the support body. The added micron-sized particles 21 are used as a coating protrusion regulator and as a light scattering effect, and the coating has a concave-convex surface after curing.

[0039] 3. Low-refractive-index bonding layer coating, coating a low-refractive index bonding layer on one side of the support, coating thickness 3-20 μm, preferably 5-8 μm, thermal curing or UV radiation curing, synchronous compounding during winding protective film10.

[004...

Embodiment 1

[0043] Low refractive index bonding layer coating solution consists of 63 grams of UV-curable acrylic pressure-sensitive adhesive, 10 grams of aluminum oxide nanoparticles, 20 grams of butyl acetate, 2 grams of bridging agent, and 4 grams are added after the dispersion is uniform. Photoinitiator 184, 1 g each of defoamer, leveling agent, and substrate wetting agent, stirred evenly, and the refractive index is 1.5-1.55.

[0044] The high refractive index concave-convex coating coating solution consists of 50 grams of polyester acrylic resin, 20 grams of nano-zinc oxide particles, 8 grams of polyethylene glycol diacrylate, and 6 grams of trimethylolpropane triacrylate. 10 grams of 5 μm polystyrene microspheres, 4 grams of photoinitiator 184 and defoamer, and 1 gram of substrate wetting agent, were prepared as a coating solution with a refractive index of 1.65-1.70.

[0045] The polyester film (PET) with a refractive index of 1.6 is selected, and the adhesive layer is coated with...

Embodiment 2

[0047] 60 grams of polyacrylate pressure-sensitive adhesive is selected as the low-refractive index bonding layer coating solution, 22 grams of toluene is selected as the first diluent, 3 grams of bridging agent and catalyst, and 14 grams of magnesium oxide nanoparticles are uniformly dispersed and added to solidify 3 grams of agent, and 1 gram each of defoamer, leveling agent, and substrate wetting agent, stir evenly, and the refractive index is 1.5-1.55.

[0048] The high refractive index concave-convex coating coating liquid is composed of 52 grams of thermosetting acrylic resin, 20 grams of nano-zirconia particles, 10 grams of benzene solvent and gasoline mixed solvent, uniformly dispersed, and adding 12 polymethyl methacrylate microspheres with a particle size of 3 μm. gram, 4 grams of curing agent, 1 gram of defoaming agent, 1 gram of substrate wetting agent, and configured as a coating solution with a refractive index of 1.65-1.70.

[0049] A polyester film (PET) with a...

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Abstract

The present invention relates to a light extraction film for an OLED illumination device. The light extraction film is composed of a supporter; a low-refractive-index adhesive layer and a protective film which are disposed on a side of the supporter; and a high-refractive-index uneven coating disposed on the other side of the supporter. The main components of the low-refractive-index adhesive layer comprise 60 to 70 parts of resin, 17 to 27 parts of first diluent, 10 to 15 parts of nanoparticles, and 2 to 5 parts of bridging agent and curing agent. The main components of the uneven coating comprise 50 to 55 parts of film-forming resin, 10 to 14 parts of the second diluent, 15 to 20 parts of nanoparticle material, 8 to 15 parts of polymer microspheres, and 2 to 5 parts of curing agent. Thelight extraction film can be directly attached to the light-emitting surface of the OLED illumination device, and increases a light extraction rate to about 80%. The light extraction film also has ananti-dazzle effect and a function of equalizing the light of a light-emitting device. The light extraction film can be manufactured by a roller-to-roller wet coating method, and is convenient to produce and low in cost.

Description

technical field [0001] The invention relates to a light extraction film of a solid light-emitting device, in particular to a light extraction film used for an OLED lighting device. technical background [0002] Organic light-emitting diodes (OLEDs), as devices for a new display and lighting technology, offer a good match for their high-efficiency large-area flexible lighting applications. Due to its unique advantages such as planar light emission, ultra-thin, transparent and flexible, as well as advantages such as high efficiency, energy saving, and environmental protection, OLED has great development potential in the two major application fields of display and lighting, and has gained widespread attention. At present, OLED lighting is as high as 150lm / W at low brightness, and its service life reaches about 30,000 hours. [0003] OLED is Organic Light-Emitting Diode (Organic Light-Emitting Diode), which is composed of a thin, transparent and semiconducting indium tin oxide ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/52H01L51/56B82Y30/00
CPCB82Y30/00H10K50/858H10K71/00
Inventor 秦长喜牛娟妮王瑞杨玉琴王世卿刘冰刘晓昊
Owner CHINA LUCKY FILM CORP
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