Patent ID: 9664919
Date: 2017-05-30
CPC Classifications: G02B,H04N

Claim:
1. A 3D display device, comprising: a display screen, for displaying two-dimensional left and right eye pictures; a magnetic field device, disposed right in front of the display screen on a light emitting side of the display screen and generating a magnetic field having a varying frequency in synchronization with a refresh frequency of the two-dimensional left and right eye pictures of the display screen, thus rotating a direction of a polarization plane of polarized light emitted from the display screen, a signal module, connected with the magnetic field device and providing a varying current signal for the magnetic field device such that the magnetic field device produces a varying magnetic field in accordance with the varying current signal, wherein the direction of the polarization plane of the linear polarized light rotated by the magnetic field device changes with refreshment of the picture of the display screen and is back and forth switched between a direction in parallel with and perpendicular to a direction of the polarization plane of the linear polarized light before rotation; wherein the current signal is a pulse current signal.