Transparent structure and screen for beam projector including same

A transparent structure comprising:

• a first panel;
• and
• a second panel on the first panel, wherein
• the first panel comprises:
• a first transparent substrate;
• a first transparent electrode on the first transparent substrate;
• a second transparent electrode separated from the first transparent electrode;
• a second transparent substrate on the second transparent electrode;
• a polymer dispersed liquid crystal layer disposed between the first transparent electrode and the second transparent electrode;
• and
• a first control part connected with the first transparent electrode and the second transparent electrode,
• the second panel comprises:
• a third transparent substrate;
• a third transparent electrode on the third transparent substrate;
• a fourth transparent electrode separated from the third transparent electrode and comprising multiple openings;
• a fourth transparent substrate on the fourth transparent electrode;
• a colloid layer disposed between the third transparent electrode and the fourth transparent electrode;
• and
• a second control part connected with the third transparent electrode and the fourth transparent electrode,
• the polymer dispersed liquid crystal layer comprises a ultraviolet curable polymer and first liquid crystals, and
• the colloid layer comprises charged particles of which surfaces exhibit (+) charge or (−) charge.