See-through display glasses for viewing 3D multimedia

• US 10,353,213 B2
• Filed: 01/12/2017
• Issued: 07/16/2019
• Est. Priority Date: 12/08/2016
• Status: Active Grant

• Current Assignee: Darwin Hu
• Original Assignee: Darwin Hu
• Inventors: Hu, Darwin
• Primary Examiner(s): Glick, Edward J
• Assistant Examiner(s): Quash, Anthony G
• Application Number:
  US15/405,067
• Publication Number:
  US 20180164599A1
• Time in Patent Office: 915 Days
• CPC Class Codes: G02B 17/086 wherein the system is made of a single block of optical material, e.g. solid catadioptric systems
• CPC Class Codes: G02B 2027/0136 with a single image source for both eyes
• CPC Class Codes: G02B 2027/014 comprising information/image processing systems
• CPC Class Codes: G02B 27/0093 with means for monitoring data relating to the user, e.g. head-tracking, eye-tracking
• CPC Class Codes: G02B 27/0172 characterised by optical features
• 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: G02B 6/0005 the light guides being of the fibre type G02B6/0003 takes precedence

Abstract

Architecture and designs of wearable devices for viewing multimedia in 3D are described. According to one aspect of the present invention, a display device is made in form of a pair of glasses. A separate enclosure is provided to generate content for display on the glasses. The content is optically picked up by an optical cable and transported by one or more optical fibers in the optical cable to the glasses, where an image polarizer receives the content and produces an alternating polarized content sequence. An optical cube is provided to decouple the alternating polarized content sequence into two orthogonally polarized image sequences are respectively projected onto two lenses.

Claims

1. A display apparatus for displaying 3D multimedia, the display apparatus comprising:

an image polarizer receiving an optical image sequence at a first rate and producing an alternating polarized image sequence at a second rate, the second rate being twice as much as the first rate, wherein each image in the optical image sequence is used to produce simultaneously two orthogonally polarized images in the alternating polarized image sequence;

an optical cube provided to receive the alternating polarized image sequence, wherein the optical cube includes two orthogonally polarized plates sandwiching the optical cube, and decouples the alternating polarized image sequence into two orthogonally polarized image sequences; and

a pair of projection mechanisms respectively for two eyes of a human being, wherein each of the projection mechanisms receives one of the two orthogonally polarized image sequences.

2. The display apparatus as recited in claim 1, further comprising:

at least one lens, and

an optical cable including at least one optical fiber to transport the optical image from one end of the optical cable to another end of the optical cable by total internal reflections in the optical fiber, wherein the optical image is projected by the at least one lens onto the image polarizer.

3. The display apparatus as recited in claim 2, wherein the image polarizer is an active shutter.

4. The display apparatus as recited in claim 2, wherein the image polarizer includes a liquid crystal layer sandwiched between two transparent layers, wherein the liquid crystal layer is applied with an electric field.

5. The display apparatus as recited in claim 4, wherein each of the projection mechanisms includes a prism receiving the one of the two orthogonally polarized image sequences from a first edge of the prism, the one of the two orthogonally polarized image sequences is seen by one of the eyes in the prism.

6. The display apparatus as recited in claim 5, wherein each of the projection mechanisms further includes an optical correcting lens integrated with the prism to correct an optical path coming out from the prism.

7. The display apparatus as recited in claim 6, wherein the prism and the optical corrector are stacked so that a user sees through the integrated lenses without optical distortion.

8. The display apparatus as recited in claim 4, wherein each of the projection mechanisms includes a set of variable focus elements, at least one of the variable focus elements is adjustable to focus the optical image from the optical fiber onto the first edge of the prism.

9. The display apparatus as recited in claim 4, wherein each of the projection mechanisms includes an optical waveguide receiving the one of the two orthogonally polarized image sequences projected onto one side of the optical waveguide and propagating the one of the two orthogonally polarized image sequences to another side of the optical waveguide, where the one of the two orthogonally polarized image sequences is seen.

10. The display apparatus as recited in claim 1, wherein a part of the optical cable is enclosed within or attached to a portion of an article of clothing.

11. A display apparatus for displaying 3D multimedia, the display apparatus comprising:

a pair of lenses;

a bridge disposed between the lenses;

an image polarizer receiving an optical image sequence at a first rate and producing an alternating polarized image sequence at a second rate, the second rate being twice as much as the first rate, wherein each image in the optical image sequence is used to produce simultaneously two orthogonally polarized images in the alternating polarized image sequence; and

an optical cube, disposed near or on the bridge, receiving the alternating polarized image sequence, wherein the optical cube sandwiched between two orthogonally polarized plates splits the alternating polarized image sequence into two orthogonally polarized image sequences, each projected into an edge of one of the two lenses.

12. The display apparatus as recited in claim 11, wherein the optical image sequence is transported by an optical cable including an optical fiber provided to transport the optical image from one end thereof to another end thereof by total internal reflections therein, and wherein the optical image is from a microdisplay.

13. The display apparatus as recited in claim 12, wherein the two orthogonally polarized image sequences are respectively projected onto the lenses.

14. The display apparatus as recited in claim 12, wherein the two orthogonally polarized image sequences are respectively projected onto an edge of each of the lenses.

15. The display apparatus as recited in claim 11, wherein each of the lenses includes a prism receiving the one of the two orthogonally polarized image sequences from a first edge of the prism, the one of the two orthogonally polarized image sequences being seen by one of the eyes through the prism.

16. The display apparatus as recited in claim 15, wherein each of the lenses further includes an optical correcting lens integrated with the prism to correct an optical path coming out from the prism.