Touch display, liquid crystal display with a built-in touch panel

A liquid crystal display (LCD) with a built-in touch panel, comprising:

• an LCD unit, comprising:
• a lower substrate;
• an upper substrate, disposed opposite to the lower substrate;
• a liquid crystal layer, disposed between the lower substrate and the upper substrate;
• a first polarized plate, disposed on the lower substrate;
• a touch panel, disposed opposite to the upper substrate;
• a second polarized plate, disposed at a side of the touch panel facing to the LCD unit, and located between the LCD unit and the touch panel;
• and
• an air layer configured between the upper substrate and the second polarized plate and an airtight gasket disposed at a periphery of the air layer surrounding the air layer,
• wherein the first polarized plate and the second polarized plate are the only polarizing plates in the liquid crystal display (LCD) with a built-in touch panel,
• the first polarized plate has a first polarized direction, and the second polarized plate has a second polarized direction, and the first polarized direction is matched with the second polarized direction for displaying an image and preventing light reflection.