Backlight module and display apparatus

A display apparatus, comprising:

• a backlight module, comprising:
• a circuit substrate;
• a plurality of light-emitting devices, disposed on the circuit substrate and electrically connected to the circuit substrate;
• a first cholesteric liquid-crystal layer, disposed on the light-emitting devices and overlapped with a light-emitting surface of each of the light-emitting devices;
• and
• a second cholesteric liquid-crystal layer, disposed on the first cholesteric liquid-crystal layer and overlapped with the first cholesteric liquid-crystal layer, wherein the first cholesteric liquid-crystal layer and the second cholesteric liquid-crystal layer respectively have a first chiral direction and a second chiral direction;
• a display panel, overlapped at the backlight module and having a liquid-crystal cell and a polarizer located between the liquid-crystal cell and the backlight module;
• and
• a quarter-wave plate, disposed between the backlight module and the display panel, wherein an included angle between a slow axis of the quarter-wave plate and an absorption axis of the polarizer is 45 degrees.