Abstract: A functional module is applied in a front light module of a display device. The functional module includes a composite cover structure having a first plate and a second plate and a reflective display panel. The second plate is located between the first plate and the reflective display panel. At least one medium layer is located between the first plate of the composite cover structure and the reflective display panel. The refractive index of the medium layer is greater than or equal to 1 and is smaller than 1.474.

Abstract: A functional module is applied in a front light module of a display device. The functional module includes a composite cover structure having a first plate and a second plate and a reflective display panel. The second plate is located between the first plate and the reflective display panel. At least one medium layer is located between the first plate of the composite cover structure and the reflective display panel. The refractive index of the medium layer is greater than or equal to 1 and is smaller than 1.474.

Abstract: A crystal growing device includes a furnace, a platform, a crucible, a heating unit, a heat transmitting block, and a heat exchanger. The furnace defines a chamber therein. The platform is disposed in the chamber and has a top surface and a bottom surface. The crucible is disposed on the top surface of the platform for receiving a crystal seed layer and a raw material therein. The heating unit is disposed in the chamber and surrounds the crucible. The heat transmitting block is disposed at the bottom surface of the platform and is made of a material with high thermal conductivity. The heat exchanger is coupled to the heat transmitting block for absorbing heat from the heat transmitting block.