Image display system, image control apparatus, image control method, and optical shutter in which plural kinds of information are multiplexed and displayed on a display surface

• US 8,696,132 B2
• Filed: 10/09/2009
• Issued: 04/15/2014
• Est. Priority Date: 10/20/2008
• Status: Active Grant

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Imai, Masao, Ishii, Junichirou, Okumura, Fujio
• Primary Examiner(s): Luu, Thanh
• Assistant Examiner(s): Naphas, Renee
• Application Number:
  US13/123,392
• Publication Number:
  US 20110193880A1
• Time in Patent Office: 1,649 Days
• Field of Search: 353/31, 345/69, 348 55- 58
• US Class Current: 353/20
• 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: G03B 21/005 Projectors using an electronic spatial light modulator but not peculiar thereto
• CPC Class Codes: G03B 35/20 using two or more projectors
• CPC Class Codes: G09G 2340/125 wherein one of the images is motion video
• CPC Class Codes: G09G 3/003 to produce spatial visual effects
• CPC Class Codes: G09G 3/3611 Control of matrices with row and column drivers
• CPC Class Codes: H04N 13/341 using temporal multiplexing
• CPC Class Codes: H04N 2013/403 the images being monoscopic
• CPC Class Codes: H04N 21/4122 additional display device, e.g. video projector digital output for controlling a plurality of local displays G06F3/1423
• CPC Class Codes: H04N 21/4318 by altering the content in the rendering process, e.g. blanking, blurring or masking an image region image enhancement or restoration in general G06T5/00
• CPC Class Codes: H04N 21/434 Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream demultiplexing of data packets for data networks, e.g. RTP/UDP H04L65/00
• CPC Class Codes: H04N 21/43637 involving a wireless protocol, e.g. Bluetooth, RF or wireless LAN [IEEE 802.11] arrangements for wireless networking or broadcasting of information in indoor or near-field type systems H04B10/114
• CPC Class Codes: H04N 5/66 Transforming electric information into light information scanning details H04N3/00
• CPC Class Codes: H04N 9/3167 for polarizing the light beam polarizing optical systems per se G02B27/28

Abstract

An image display system includes: display unit (13) for spatially combining a first polarized image generated by first polarized light and a second polarized image generated by second polarized light having a polarized light component different from that of the first polarized light and displaying a combined polarized image; display control unit (1) for causing display unit (13) to multiplex-display a plurality of different images in a time division manner concerning each of the first and second polarized images; and optical shutter (14) that selectively transmits only a polarized image corresponding to a selected image arbitrarily selected from among the plurality of different images.

Claims

1. An image display system comprising:

a display unit that spatially combines a first polarized image generated by first polarized light and a second polarized image generated by second polarized light whose polarized light component is different from that of the first polarized light and that displays a combined polarized image;

a display control unit that causes the display unit to multiplex-display a plurality of different images in a time division manner concerning each of the first and second polarized images; and

an optical shutter that selectively transmits only a polarized image corresponding to a selected image arbitrarily selected from among the plurality of different images,

wherein

the display control unit outputs a control signal that indicates timing of switching of the plurality of different images,

the optical shutter specifies a display period of the selected image on the basis of the control signal, and

the optical shutter transmits, of the first polarized light and the second polarized light, polarized light used for generation of the selected image and blocks the other polarized light in the display period of the selected image and blocks the first polarized image and the second polarized image in a period other than the display period of the selected image.

2. The image display system according to claim 1, wherein the display control unit causes the display unit to multiplex-display three or more different images in a time division manner in each of the first and second polarized images.

3. The image display system according to claim 1, wherein the display control unit switches, in each fixed display period, images multiplex-displayed as the first polarized image and images multiplex-displayed as the second polarized image.

4. The image display system according to claim 1, wherein the display control unit causes the display unit to display the plurality of different images at random as the first and second polarized images.

5. The image display system according to claim 1, wherein

each of the plurality of different images includes a plurality of decomposed images that form one continuous image by being temporally fused, and

the display control unit causes the display unit to display the plurality of decomposed images while allocating the decomposed images to the first and second polarized images.

6. The image display system according to claim 1, wherein

the display unit displays, at different timings, a first display state in which a first image is displayed by the first polarized light and in which a second image different from the first image is displayed by the second polarized light and a second display state in which the second image is displayed by the first polarized light and in which the first image is displayed by the second polarized light, and

the optical shutter transmits the first polarized light and blocks the second polarized light in the first display state and transmits the second polarized light and blocks the first polarized light in the second display state.

7. An image control method comprising:

causing display unit that spatially combines a first polarized image generated by first polarized light and a second polarized image generated by second polarized light whose polarized light component is different from that of the first polarized light and that displays a combined polarized image to multiplex-display a plurality of different images in a time division manner concerning each of the first and second polarized images;

causing an optical shutter to selectively transmit only a polarized image corresponding to a selected image arbitrarily selected from among the plurality of different images; and

causing the optical shutter to transmit, of the first polarized light and the second polarized light, polarized light used for generation of the selected image and block the other polarized light in the display period of the selected image and block the first polarized image and the second polarized image in a period other than the display period of the selected image.

8. The image control method according to claim 7, further comprising the display unit to multiplex-display three or more different images in a time division manner in each of the first and second polarized images.

9. The image control method according to claim 7, further comprising switching, in each fixed display period, images multiplex-displayed as the first polarized image and images multiplex-displayed as the second polarized image.

10. The image control method according to claim 7, further causing the display unit to display the plurality of different images at random as the first and second polarized images.

11. The image control method according to claim 7, wherein

each of the plurality of different images includes a plurality of decomposed images that form one continuous image by being temporally fused, and

the image control method further comprises causing the display unit to display the plurality of decomposed images while allocating the decomposed images to the first and second polarized images.

12. The image control method according to claim 7, further comprising:

causing the display unit to display, at different timings, a first display state in which a first image is displayed by the first polarized light and in which a second image different from the first image is displayed by the second polarized light and a second display state in which the second image is displayed by the first polarized light and in which the first image is displayed by the second polarized light, and

causing the optical shutter to transmit the first polarized light and block the second polarized light in the first display state and transmit the second polarized light and block the first polarized light in the second display state.

13. An optical shutter comprising:

a liquid crystal panel unit in which switching of a state is performed among a first polarized light separation state in which first polarized light is transmitted and second polarized light whose polarized light component is different from that of the first polarized light is blocked, a second polarized light separation state in which the second polarized light is transmitted and the first polarized light is blocked, and a third polarized light separation state in which both the first polarized light and the second polarized light are blocked; and

a liquid crystal driving unit that controls, on the basis of a control signal supplied from an outside, the switching of the first to third polarized light separation states in the liquid crystal panel unit.

14. The optical shutter according to claim 13, wherein the liquid crystal panel unit includes:

a first liquid crystal panel for which switching of a first state in which incident light is transmitted while maintaining a polarization state thereof and a second state in which the polarization state of the incident light changes during transmission is possible;

a first sheet polarizer arranged on an exit surface side of the first liquid crystal panel;

a second liquid crystal panel for which the switching of the first and second states is possible; and

a second sheet polarizer arranged on an exit surface side of the second liquid crystal panel.

15. The optical shutter according to claim 14, wherein the liquid crystal panel unit further includes a quarter-wave plate arranged on an incidence surface side of the liquid crystal panel.

16. The optical shutter according to claim 13, further comprising an image selection input unit that selects an image that should be observed from among the plurality of different images, wherein

the liquid crystal driving unit specifies, on the basis of the control signal, a display period in which a selected image selected by the image selection input unit is displayed on display unit on an outside, transmits, of the first polarized light and the second polarized light, polarized light used for generation of the selected image, and blocks the other polarized light in the display period of the selected image.

17. The optical shutter according to claim 16, wherein the liquid crystal driving unit blocks the first polarized image and the second polarized image in a period other than the display period of the selected image.

18. An optical shutter comprising:

a liquid crystal panel unit in which switching of a state is performed between a first polarized light separation state in which first polarized light is transmitted and second polarized light whose polarized light component is different from that of the first polarized light is blocked and a second polarized light separation state in which the second polarized light is transmitted and the first polarized light is blocked;

a liquid crystal driving unit that controls, on the basis of a control signal supplied from an outside, the switching of the first and second polarized light separation states in the liquid crystal panel unit; and

an image selection input unit that selects an image that should be observed from among the plurality of different images,

wherein the control signal indicates timing of switching of an image and indicates a polarization direction of the image,

wherein the liquid crystal driving unit specifies, on the basis of the control signal, a display period in which a selected image selected by the image selection input unit is displayed on display unit on an outside, transmits, of the first polarized light and the second polarized light, polarized light used for generation of the selected image, and blocks the other polarized light in the display period of the selected image, and

wherein the liquid crystal driving unit blocks the first polarized image and the second polarized image in a period other than the display period of the selected image.