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Optical film and display device comprising same

A display device and optical film technology, which is applied in optics, optical elements, nonlinear optics, etc., and can solve the problems of poor viewing angle characteristics of optical films

Pending Publication Date: 2022-01-18
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, such optical films are inferior in viewing angle characteristics compared with circular polarizing plates

Method used

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  • Optical film and display device comprising same
  • Optical film and display device comprising same
  • Optical film and display device comprising same

Examples

Experimental program
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Embodiment approach

[0433] Hereinafter, the specification will be described in detail with reference to examples. However, the embodiments according to the present specification can be modified into various other forms, and the scope of the present specification should not be construed as being limited to the embodiments described below. The examples of this specification are provided to more fully describe this specification to those of ordinary skill in the art.

[0434] Examples and Comparative Examples

[0435] As the binder resin, AD-701 (LG Chem.) (solid content 15.5%) was used, and a certain amount of dye was dissolved in methyl ethyl ketone (MEK) so that the amount of dye or pigment became relative to The solid content of 100 parts by weight of the binder resin is 0.2 to 1.5 parts by weight, and as a result, a composition for forming an optical film is prepared. Specific types and amounts of dyes or pigments are described in Table 1 below.

[0436] Binder resin AD-701 (LG Chem.) accord...

preparation example

[0443]

[0444]

[0445] Synthesis of compound 1_1

[0446] Benzaldehyde (20.0 g) was introduced into the pyrrole solvent and stirred well. Thereto was slowly introduced trifluoroacetic acid (0.10 eq.). After confirming the completion of the reaction, the resultant was extracted with dichloromethane and aqueous sodium bicarbonate solution. The extracted organic layer was dried with sodium sulfate, and then a silica gel column was used to obtain purified and isolated compound 1_1 (15.5 g, yield 37.0%).

[0447] Synthesis of compound 1_2

[0448] Compound 1_1 (15.5 g) was well stirred and dissolved in tetrahydrofuran solvent. The reaction solution was cooled to -78°C using dry ice and acetone, and N-bromosuccinimide (NBS) (2.0 equivalents) was slowly introduced thereto in a solid state while maintaining the temperature. Upon completion of the reaction, the reaction solution was cooled to 0° C. using ice water, and then 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) (...

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Abstract

The present application relates to an optical film and a display device comprising the same. One embodiment provides such an optical film comprising a dye or a pigment that absorbs at least a part of light with a wavelength of 490-510 nm, having a transparent color, of a CIE standard illuminant D65 light source, which satisfies -8<a*<8 and -8<b*<8, satisfying equations 1 and 2. ([equation 1] T% (500 nm) < T% (530 nm), [equation 2] [T%(500 nm) * 1.8] < [T%(460 nm) + T%(610 nm)], and in equations 1 and 2, T% (A nm) means transmittance at A nm wavelength.

Description

technical field [0001] This specification relates to an optical film and a display device including the same. [0002] This application claims priority and benefit from Korean Patent Application No. 10-2020-0027240 filed with the Korean Intellectual Property Office on March 4, 2020, the entire contents of which are incorporated herein by reference. Background technique [0003] Electrodes in organic light emitting diodes (OLEDs) are made of metal elements, which causes a problem of significantly reducing the contrast of the display due to high external light reflectance. In view of the above, circular polarizing plates are laminated to suppress reflection of external light, however, this method leads to disadvantages of increased material cost and reduced flexibility, and inability to flexibly adjust the hue of luminous color. [0004] In order to replace circular polarizing plates, low-cost optical films for anti-reflection by introducing dyes and pigments into adhesive fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/22H01L27/32
CPCG02B5/223H10K59/38H10K59/8791C08K5/3415C08K5/00G02F1/1335C09J7/10C09J2203/318C09J2301/408C08K5/0041C09B57/10G02B5/22C09B47/00C09B67/0063C09J11/06C09J2203/326H10K50/86
Inventor 金奉俊朴智勋李渊槿朱文奎金悳焕
Owner LG CHEM LTD
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