Design and fabrication compound diffuser film with LIGA-like process

Effective Optical Diffuser Based on Interfacial Hydrogen-Bonding Polymer Complexation

“…Optical diffuser is used to scatter/diffuse the light for various optoelectronic applications, such as liquid crystal display, light-emitting diodes, solar cells, and photodetectors. − An optical diffuser realizes photo management through positive utilization of light scattering. Microspheres (solid, core–shell or hollow), − nanofibers (cellulose nanofiber, cellulose nanocrystal, or devirite), , microvoids, wrinkles, micropyramids, and microlenses − have been introduced on the surface or in the bulk matrix as scattering units to produce effective optical diffusion.…”

“…Microdroplets are formed during hot blending of PMMA and PET owning to the phase separation of two incompatible compounds based on the mechanism of nucleation and growth, and when cooling, the microdroplets will become solid spheres that can effectively scatter light . Liquid crystal structures or polymer-dispersed liquid crystal microdroplets can manipulate light scattering with different stimuli, which have been exploited for optical diffusion. − Delicate microfabrication techniques, such as lithography, embossing, and laser ablation, have also been utilized to fabricate periodical surface-relief patterns which also show a good effect of optical diffusion. ,,− …”

Enhancement of physical and optical performances of polycarbonate‐based diffusers for direct‐lit LED backlight unit by incorporation of nanoclay platelets

“…Recently, incorporation of crosslinked polymeric beads, such as polystyrene (PS), poly(methyl methacrylate) (PMMA), and silicone, has been attempted to improve the physical properties as well as optical performances of compound‐type diffusers prepared via extrusion compounding followed by a casting roll process . In particular, Kim et al .…”

A facile fabrication of light diffusing film with LDP/polyacrylates composites coating for anti-glare LED application

“…On the basis of different diffusing principles, the light diffusing films can be classified into two types: the particle-diffusing type [9][10][11][12][13] and the surface-relief type [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28].…”

“…There are various methods for fabricating surface-relief type such as replica molding method [14,15], embossing process [7,16,17], lithography [8,18,19], electrospray method [20,21], etching [22,23], holographic technology [24], etc. According to the different preparation methods, the micro-structure can be a hemisphere [14,15,20,21], paraboloidal shape [8], polygonal shape [3,26], pyramid [27,28], cylindrical lens [16], V-shaped mirror [17], or irregular type [4,19,22,23], etc. Shih et al [14] casted a liquid PDMS into concave microlens molds to form the PDMS microlens array with good light diffusing effect.…”