| When it is done 
                                in a proper way, a piece of glass can adjust the 
                                light transmission rate passing through it by 
                                changing its transparency or colour. This process 
                                is called chromogenic. There are several chromogenics. 
                                They are electrochromic, photochromic, thermochromic 
                                and gasochromic etc. The most popular is electrochromic. 
                                There are two types of electrochromic, PDLC (polymer 
                                dispersed liquid crystal) and SPD (suspension 
                                particle device). And PDLC is most frequently 
                                used.
                                 PDLC glass is a light control 
                                  glass. It can regulate and adjust the light 
                                  intensity or light transmission passing through 
                                  the glass. Sometimes, it is known as intelligent 
                                  glass, magic glass, privacy glass, smart glass 
                                  or switchable glass. 
                                   
                                   
                                  Polymer dispersed liquid crystal film is a light 
                                  changing liquid crystal film. It is base on 
                                  the especial performance of liquid crystal material 
                                  “light valve”. Crystal tiny drop in this film 
                                  under external electric field rank, distribute 
                                  in order, when incident light completely permeate, 
                                  film display clear and colorless state; when 
                                  external electric field disappear, crystal tiny 
                                  drop in this film rank order is disturbed, which 
                                  is made incident light scattering to create 
                                  “sandblasted glass” effect. Also let positive 
                                  and negative type of PDLC crystal dye bond make 
                                  full color light valve film, through change 
                                  voltage size and frequency to show kinds of 
                                  color.  
                                Regulating 
                                  light crystal film firstly applies in NASA manned 
                                  spacecraft glass new material project and obtain 
                                  success. 
                                This material through decade 
                                  developing after invented, more and more applies 
                                  in civil product market, because of productive 
                                  procedure perfecting step-by-step and cost continuously 
                                  reducing. 
                                Regulating light glass is one 
                                  of the intelligence type of top grade function 
                                  glass, it adjusts sunlight change from beat 
                                  and dispersion through voltage on and off, it 
                                  made glass transparence and protective intimity 
                                  double requirement come true, even if it is 
                                  not transparence, light transmitting is also 
                                  good, ray is enough in room, that is all curtain 
                                  can not come true, furthermore, it acts as insulation 
                                  and reflection to infrared, to make inside of 
                                  room warm in winter and cool in summer, moreover 
                                  it is environmental protection and energy saving 
                                  products. This products adopt laminated glass 
                                  process, are made of regulating light film compound 
                                  in two piece of glass, it makes use of liquid 
                                  crystal optic anisotropy to come true regulating 
                                  light film photo-electricity performance. 
                                At present, mostly of this products 
                                  are producing from America, Japan and Korea, 
                                  and widely using in European and America. Stars 
                                  in Hollywood, director, a merchant prince, international 
                                  company etc they use regulating light glass 
                                  to decorate their nobleness construction. Disney 
                                  park also use regulating light film to reach 
                                  at magic aim, some top grade of cars like BMW 
                                  use this products to make dormer, still villa, 
                                  bank, hospital, insurance company, hotel, restaurant, 
                                  museum, church, direction center etc they use 
                                  it to make door, windows, sunshade and obstruct. 
                                  Transparence screen in emporium is also made 
                                  up of this product for attracting customers.  |