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Optical film and surface light emitting body

An optical film, light diffusion technology, applied in optics, optical components, electroluminescent light sources, etc., can solve the problems of light extraction efficiency or ortho brightness difference, to suppress the exit angle dependence, improve light extraction efficiency or Ortho-brightness, the effect of ortho-brightness improvement

Inactive Publication Date: 2015-12-23
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the surface illuminator proposed in Patent Document 2 has the problem of poor light extraction efficiency or poor normal brightness.

Method used

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  • Optical film and surface light emitting body
  • Optical film and surface light emitting body
  • Optical film and surface light emitting body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0226] Hereinafter, although an Example demonstrates this invention concretely, this invention is not limited to these Examples.

[0227] In addition, "parts" and "%" in an Example represent "parts by mass" and "% by mass".

[0228] (warpage evaluation)

[0229] The optical film obtained in Examples and Comparative Examples was cut into a 13 cm square size, and it was left still on a flat surface with the surface having the concavo-convex structure as the top. In this state, the distance from the plane of each of the four corners of the optical film was measured using a ruler, and the average value of the distance was recorded as the amount of curvature of the optical film.

[0230] (Measurement of light extraction efficiency)

[0231] On the surface light-emitting bodies obtained in the examples, comparative examples, and reference examples, a light-shielding sheet with a thickness of 0.1 mm and a hole with a diameter of 10 mm is arranged, and it is arranged on an integrati...

reference example 1

[0250] The organic EL light-emitting element A is directly used as a surface light-emitting body.

Embodiment 1

[0252] (Manufacture of Binder Solution A)

[0253] In ethyl acetate, 99 parts of n-butyl acrylate, 1 part of 2-hydroxyethyl acrylate, and 0.2 parts of azobisisobutyronitrile were dissolved and reacted at 70°C for 5 hours to obtain a solid content of 30 % acrylic resin solution. 0.5 part of trimethylolpropane toluene diisocyanate was added with respect to 100 parts of solid content of the obtained acrylic resin solution, and the adhesive solution A was obtained.

[0254] (Manufacture of Mixture A)

[0255] Mixture A was obtained by mixing 98% of binder solution A and 2% of microparticles A.

[0256] (Manufacture of adhesive layer laminated base material)

[0257] A comma knife coater ( commacoat 1) The obtained mixture A was applied until the thickness of the dried adhesive layer became 25 μm, and after drying at 100° C. for 1 minute, it was bonded to a polyethylene terephthalate substrate ( Trade name "DIAFOILT910E125" (manufactured by Mitsubishi Plastics Co., Ltd.), to o...

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Abstract

This optical film comprises: a recessed and projected structure layer that forms one surface of the optical film; and an adhesive layer that forms the other surface of the optical film. The recessed and projected structure layer contains 1-28% by mass of first fine light diffusing particles relative to the total mass of the recessed and projected structure layer, and the adhesive layer contains 1-40% by mass of second fine light diffusing particles relative to the total mass of the adhesive layer. This surface light emitting body comprises the above-described optical film.

Description

technical field [0001] The invention relates to an optical film and a surface light emitter. [0002] This application claims priority based on Japanese Patent No. 2013-079071 for which it applied in Japan on April 5, 2013, and uses the content here. Background technique [0003] Among surface light emitters, organic EL (electroluminescence) light-emitting elements are expected to be used in flat panel displays or in next-generation lighting as a substitute for fluorescent lamps and the like. [0004] The structure of an organic EL light-emitting element varies from a simple structure in which an organic thin film as a light-emitting layer is sandwiched between two electrodes to a structure in which a multi-layered organic thin film includes a light-emitting layer. As the latter multilayer structure, for example, a hole transport layer, a light emitting layer, an electron transport layer, and a cathode are laminated on an anode provided on a glass substrate. The layers san...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/02H01L51/50H05B33/02H05B44/00
CPCG02B5/0242H10K50/854H10K50/858G02B5/02H10K71/00G02B5/0278
Inventor 森中刚服部俊明奥野大地
Owner MITSUBISHI CHEM CORP