Optical film with microstructures array for slim-type backlight applications

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

“…[4][5][6] As optical materials, various types of polymeric sheets or films such as lightguide plates (LGP), diffuser sheets, prism films, and bright enhancement films (BEF), have been used to induce transmission, multiple reflections and refractions of incident light rays. [7][8][9] The BLU can be classified into two different types, edge-lit and direct-lit BLU, according to the location of the light source. The edge-lit backlight system, which is capable of slimmer and lightweight LCDs, has been typically utilized for small-sized displays of IT products such as mobile phones and notebook computers, because of its limitation in the achievement of high luminance and good luminance uniformity for large-sized displays.…”

“…As a light source, the conventional cold cathode fluorescent lamp (CCFL) or flat fluorescent lamp (FFL) have been used, but recently are being rapidly replaced by light‐emitting diodes (LED), which have many advantages such as good color reproduction, good durability, low power consumption, and environmental friendliness . As optical materials, various types of polymeric sheets or films such as light‐guide plates (LGP), diffuser sheets, prism films, and bright enhancement films (BEF), have been used to induce transmission, multiple reflections and refractions of incident light rays …”

Nanosecond pulsed laser texturing of optical diffusers

“…4,8 Most diffusers consist of surfacerelief structures including microlenses, pyramids, and textured surfaces due to the simplicity and time required for their fabrication. [9][10][11][12][13] Optical diffusers have been fabricated employing a range of coating processes. 5,14 However, nanosecond pulsed laser patterning of optical diffusers have not been studied.…”

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.…”