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. |