A parallel resonant converter circuit with current-equalization function includes a power input terminal, a power output terminal, an output capacitor, first and second resonant converters and a third transformer. A light sensor is positioned on the base and is configured to receive the light signal after the light signal exits from the waveguide. A frictional clutch is disposed in the housing and includes a drum. Therefore, the liquid crystal display module and the cases are tightly combined, and productivity of the liquid crystal display apparatus can increase by reducing the number of parts demanded for fabrication of the liquid crystal display module and the cases.