Active-shutter 3D glasses and operating method thereof

• US 9,494,804 B2
• Filed: 11/26/2012
• Issued: 11/15/2016
• Est. Priority Date: 03/31/2012
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd., Chengdu BOE Optoelectronics Technology Company Limited (BOE Technology Group Co., Ltd.)
• Original Assignee: BOE Technology Group Co., Ltd., Chengdu BOE Optoelectronics Technology Company Limited (BOE Technology Group Co., Ltd.)
• Inventors: Zuo, Xiongcan, Lim, Junhwan, Zhang, Junrui
• Primary Examiner(s): Pinkney, Dawayne A
• Application Number:
  US13/995,920
• Publication Number:
  US 20140078571A1
• Time in Patent Office: 1,450 Days
• Field of Search: 359/282, 359/462, 359/465, 359237-238, 359245-246, 359/464, 359/466, 345/7, 348/55, 348/53
• US Class Current: 1/1
• CPC Class Codes: G02B 30/24 involving temporal multiplexing, e.g. using sequentially activated left and right shutters
• CPC Class Codes: G02B 30/25 using polarisation techniques
• CPC Class Codes: G02F 1/09 based on magneto-optical elements, e.g. exhibiting Faraday effect
• CPC Class Codes: G02F 1/092 Operation of the cell; Circuit arrangements
• CPC Class Codes: H04N 13/341 using temporal multiplexing
• CPC Class Codes: H04N 2213/008 Aspects relating to glasses for viewing stereoscopic images

Abstract

An active-shutter 3D glasses and an operating method thereof, the active-shutter 3D glasses comprises: 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.

Claims

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).

2. The active-shutter 3D glasses according to claim 1, wherein the signal module is located on the frame.

3. The active-shutter 3D glasses according to claim 1, wherein at a first moment, the polarized light entering the transparent medium of one of the left and right magneto-optical eyeglasses passes through its corresponding rear polarizer, whereas the polarized light entering the transparent medium of the other of the left and right magneto-optical eyeglasses can not pass through its corresponding rear polarizer;

and at a second moment just subsequent to the first moment, the polarized light entering the transparent medium whose corresponding rear polarizer the polarized light at a previous moment passed through is not allowed to pass through its corresponding rear polarizer, whereas the polarized light entering the transparent medium whose corresponding rear polarizer the polarized light at the previous moment could not pass through is allowed to pass through its corresponding rear polarizer.

4. The active-shutter 3D glasses according to claim 1, wherein the time interval between the first moment and the second moment is not greater than a visual persistence time of a human eye.

5. The active-shutter 3D glasses according to claim 1, wherein the left and right transparent mediums are transparent magneto-optical glass, transparent diluted magnetic semiconductor thin films or transparent magneto-optical thin films.

6. The active-shutter 3D glasses according to claim 1, wherein the magnetic field apparatus tightly surrounds the left and right magneto-optical eyeglasses.

7. The active-shutter 3D glasses according to claim 1, wherein the magnetic field apparatus comprises left and right coils;

the left coil is surroundingly placed outside the periphery of the left magneto-optical eyeglass, and the right coil is surroundingly placed outside the periphery of the right magneto-optical eyeglass.

8. The active-shutter 3D glasses according to claim 1, wherein the electric-current signal is a pulsed electric-current signal.

9. The active-shutter 3D glasses according to claim 1, wherein the left or the right magneto-optical eyeglass comprises a flat and straight edge;

the infrared sensing transmitter is provided on the flat and straight edge, and the infrared sensing receiver is arranged on any other edge of the left or the right magneto-optical eyeglass except for the flat and straight edge.

10. An operating method of an active-shutter 3D glasses, the 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 an 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 rotate 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, and the left and right magneto-optical eyeglasses are not a liquid crystal eyeglass, and

the operating method, comprising;

step 101, the signal module provides an electric-current signal to the magnetic field apparatus;

step 102, the magnetic field apparatus generates a magnetic field corresponding to the electric-current signal; and

step 103, 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 transparent mediums are transparent mediums with a predetermined Verdet constant

wherein the active-shutter 3D glasses further comprises an infrared sensing transmitter and an infrared sensing receiver, and before the step 101, the method further comprises;

step 201, the infrared sensing transmitter transmits infrared light in a predetermined direction;

step 202, the infrared sensing receiver receives the transmitted infrared light;

step 203, the infrared sensing receiver obtains a tilt angle according to the transmitting position and the receiving position of the infrared light, 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;

the magnetic field consequently causes the polarization plane of the polarized light entering the transparent medium to rotate, and at this time, the rotation angle of the polarization plane of the polarized light is a Faraday rotation angle which can compensate for the tilt angle of the 3D glasses, so that the polarization plane of the polarized light is caused to rotate to an orientation actually needed, wherein the absolute value of the Verdet constant of the left and right transparent mediums is greater than 0.3 min/(Oe·

cm).

11. The operating method of the active-shutter 3D glasses according to claim 10, wherein at a first moment, the polarized light entering the transparent medium of one of the left and right magneto-optical eyeglasses passes through its corresponding rear polarizer, whereas the polarized light entering the other transparent medium can not pass through its corresponding rear polarizer;

and at a second moment just subsequent to the first moment, the polarized light entering the transparent medium whose corresponding rear polarizer the polarized light at a previous moment passed through is not allowed to pass through its corresponding rear polarizer, whereas the polarized light entering the transparent medium whose corresponding rear polarizer the polarized light at the previous moment could not pass through is allowed to pass through its corresponding rear polarizer.

12. The operating method of the active-shutter 3D glasses according to claim 10, wherein the magnetic field apparatus comprises:

left and right coils, provided outside the left and right magneto-optical eyeglasses, respectively;

the step 101 comprises a step as follows;

the signal module provides an electric-current signal for the left coil and an electric-current signal for the right coil, respectively;

the step 102 comprises a step as follows;

the left coil generates a left magnetic field corresponding to the respective electric-current signal, and the right coil generates a right magnetic field corresponding to the respective electric-current signal.

13. The operating method of the active-shutter 3D glasses according to claim 10, wherein the step 101 comprises a step as follows:

the signal module provides a pulsed electric-current signal to the magnetic field apparatus.