Optical film for Mini LED backlight module and preparation method thereof

• Main Authors: YANG LING, XIAO HUILI, LYU GUOQIANG, FENG QIBIN, ZHANG LE
• Format: Patent
• Language: Chinese; English
• Published: 16.11.2021
• Subjects: APPARATUS SPECIALLY ADAPTED THEREFOR; CINEMATOGRAPHY; DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; ELECTROGRAPHY; FREQUENCY-CHANGING; HOLOGRAPHY; MATERIALS THEREFOR; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; ORIGINALS THEREFOR; PHOTOGRAPHY; PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES,e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTORDEVICES; PHYSICS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

The invention discloses an optical film for a Mini LED backlight module and a preparation method thereof, the Mini LED backlight module comprises a diffusion film, an optical film, a reflecting film and a Mini LED, the diffusion film is arranged at the upper end of the optical film; the reflecting film is arranged at the lower end of the optical film; the Mini LED is arranged between the reflecting film and the optical film; the first end of the optical film comprises a plurality of first microstructures, and the second end of the optical film comprises a plurality of second microstructures; one end of an optical film substrate is spin-coated with optical cement; a microstructure morphology is formed on the surface of the optical cement by adopting a photoetching direct writing process; and the morphology is cured after developing and hot drying, and the optical film is obtained. The two-layer microstructure surface type is designed according to the total reflection law, it is guaranteed that the first-layer