Abstract: A helmet with a turn signal display system, comprising one or more displays for illumination, a power source unit configured to provide power to the one or more displays, a control unit configured to control the one or more display. The helmet further comprises a luminous sensing unit, a tilt calculator unit, and an analyzer unit. The luminous sensing unit measures outdoor lighting conditions and provides a feedback signal to the control unit. The tilt calculator unit configured to calculate a tilt angle between axes of a vehicle to a surface and sends one or more data on the tilt angle to the control unit. The analyzer unit configured to process one or more neuron behaviors of a user, and provides the one or more neural activities to the control unit. The control unit generates an output signal via the one or more display.