A backlight system and an LCD employing the backlight system. The display device may include a display module, a back cover that supports a back surface of the display module, and a top case that covers an edge portion of a front surface andor a lateral surface of the display module. The product film has a very uniform stoichiometry throughout the reactor. In the right-angled structure, the connection faces are connected by an adhesive having a lower Young’s modulus than that of an adhesive used on the connection faces of the tilted structure. Rigid foam insulation is inserted at the outside wall. The adaptive noise generating device includes a carrier panel, an actuator arranged on the carrier panel.