Optimized Micro-Prism Diffusion Film for Slim-Type Bottom-Lit Backlight Units

Optical diffusers with enhanced properties based on novel polysiloxane@CeO2@PMMA fillers

“…However, these materials have the disadvantages of high thermal sensitivity, poor UV-shielding effect and low NIR absorption, which limits the use of diffusers in applications such as monitors, military projectors, and night vision LCDs. [8][9][10] The other relied on adding transparent micro beads or llers inside the plates to scatter light, which is called volumetric diffusers. 7 One of them is mainly dependent on the microstructures of the surface layer, such as microlenses, pyramids, rough surfaces and other microstructures, and is called surface-relief diffusers.…”

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.…”

“…Wang et al [22] dipped poly(dimethyl siloxane) films into the H 2 SO 4 /HNO 3 solution and obtained microscale surface undulations which could serve as the surface relief diffusers. The optical properties of surface-relief type films are intimately linked with the transparency of the materials and the design parameters of the micro-structures [25,28] such as their geometric shape, size, distribution pattern, density and so on. Specifically, the uniformity of the surface micro-structure determines the homogeneity of the light distribution.…”

Strategy for developing high efficiency backlight module for LCD

“…However, on the other hand, the improvement on the backlight module is making the efficiency better without trading off readily achieved image quality. Besides the improvement at component level, such as light source efficiency and reflectivity of reflector etc., there are also solutions from system level, such as matching the spectrum of light source and color filter [1,2], and exploiting brightness enhancement film for the best utilization of energy [3]. However, the major efficiency loss happens at down polarizer and color filter, which conceptually take away at least one half and two thirds respectively of the light source energy for unpolarized white light source, such as CCFL and white LED module.…”