Patent ID: 9494804
Filing Date: 2016-11-15
CPC Classification: G02B,G02F,H04N

Claim Text:
1. An active-shutter 3D glasses, comprising: a frame, comprising temples; left and right magneto-optical eyeglasses, supported by the frame, and comprising left and right transparent mediums and left and right rear polarizers, respectively; a magnetic field apparatus, located outside the left and right magneto-optical eyeglasses, and providing the left and right magneto-optical eyeglasses with a magnetic field which causes polarization planes of polarized light entering the left and right magneto-optical eyeglasses to rotate; and a signal module, connected with the magnetic field apparatus, and providing a electric-current signal to the magnetic field apparatus so that the magnetic field corresponds to the electric-current signal, and the electric-current signal is changed so that the magnetic field which rotates the polarized light is induced, wherein the generated magnetic field causes the polarization planes of the polarized light entering the left and right transparent mediums to rotate, respectively, wherein the left and right magneto-optical eyeglasses are not a liquid crystal eyeglass, the left and right transparent mediums are transparent mediums with a predetermined Verdet constant wherein the active-shutter 3D glasses further comprising an infrared sensing transmitter and an infrared sensing receiver; the infrared sensing receiver is connected with the signal module; the infrared sensing transmitter transmits infrared light in a predetermined direction, and the infrared sensing receiver receives the transmitted infrared light, and according to the transmitting position and the receiving position of the infrared light, obtains a tilt angle of the active-shutter 3D glasses, and feeds the tilt angle to the signal module, so that the signal module adjusts the electric-current signal according to the tilt angle, so as to cause the magnetic field apparatus to change the magnetic field; and wherein the absolute value of the Verdet constant of the left and right transparent mediums is greater than 0.3 min/(Oe·cm).