Besides the same function as common laminated glass in explosion-proof, sound insulation, and warm keeping, TPG can also adjust its color automatically in response to the change of heat and light, accomplish the reversible change from dark to light, and keep the perspectivity. TPG is perfect combination of day lighting and sun shading. It is specially designed as a color changing glass in the construction field to increase the function of sun shading for building and save the cost of sun shading materials as well as labors. The more important thing is that it can change the coat of building automatically base on light and heat conditions. TPG can increase the dual-function of warm keeping and heat insulation with a new character of more low carbon, more intelligence.