Three Dimensional Image Display Device

• US 20120127383A1
• Filed: 07/22/2011
• Published: 05/24/2012
• Est. Priority Date: 11/19/2010
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Kim, Kang-Min, Kim, Jung-Won, Lee, Jun Pyo, Hur, Se Huhn, Jung, Jae Woo, Park, Bong Im, Ahn, Ik Hyun
• Granted Patent: US 8,780,286 B2
• Time in Patent Office: Days
• US Class Current: 349/15
• 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 1/0136 for the control of polarisation, e.g. state of polarisation [SOP] control, polarisation scrambling, TE-TM mode conversion or separation G02F1/0353 takes precedence
• CPC Class Codes: G02F 1/1347 Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells
• CPC Class Codes: G02F 2203/07 Polarisation dependent
• CPC Class Codes: G09G 2310/024 Scrolling of light from the illumination source over the display in combination with the scanning of the display screen
• CPC Class Codes: G09G 2320/0209 Crosstalk reduction, i.e. to reduce direct or indirect influences of signals directed to a certain pixel of the displayed image on other pixels of said image, inclusive of influences affecting pixels in different frames or fields or sub-images which constitute a same image, e.g. left and right images of a stereoscopic display
• CPC Class Codes: G09G 3/342 using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence
• CPC Class Codes: H04N 13/341 using temporal multiplexing
• CPC Class Codes: H04N 13/398 Synchronisation thereof; Control thereof

Abstract

A three-dimensional image display device includes a display and a polarization switching panel. The display includes a signal transmitter, and is configured to alternately display a left eye image and a right eye image. The polarization switching panel includes a signal receiver, an upper substrate, an upper electrode disposed on the upper substrate, a lower substrate, and a lower electrode disposed on the lower substrate. The signal transmitter and the signal receiver are synchronized by a 3D synchronization signal.

Claims

1. A three-dimensional image display device comprising:

a display comprising a signal transmitter, wherein the display is configured to alternately display a left eye image and a right eye image; and

a polarization switching panel comprising a first signal receiver, an upper substrate, an upper electrode disposed on the upper substrate, a lower substrate, and a lower electrode disposed on the lower substrate,

wherein the signal transmitter and the first signal receiver are synchronized by a 3D synchronization signal.

2. The three-dimensional image display device of claim 1, wherein:

the upper electrode and the lower electrode are not patterned.

3. The three-dimensional image display device of claim 1, wherein:

the upper electrode and the upper substrate have a substantially similar shape with respect to each other, and the lower electrode and the lower substrate have a substantially similar shape with respect to each other.

4. The three-dimensional image display device of claim 1, wherein:

the polarization switching panel is configured to convert a light emitted from the display having linear polarization to a light having left circular polarization or a light having right circular polarization.

5. The three-dimensional image display device of claim 4, wherein:

the polarization switching panel comprises a liquid crystal layer disposed between the lower electrode and the upper electrode, and

liquid crystals in the liquid crystal layer are aligned at about +45 degrees or about −

45 degrees with respect to the light emitted from the display, in response to a voltage being applied to the upper electrode and the lower electrode.

6. The three-dimensional image display device of claim 4, wherein:

the 3D synchronization signal is synchronized with a voltage being applied to the upper electrode and the lower electrode.

7. The three-dimensional image display device of claim 1, wherein:

the polarization switching panel is detachable.

8. The three-dimensional image display device of claim 1, wherein:

an operation frequency of the display is at least about 240 Hz.

9. The three-dimensional image display device of claim 1, wherein:

the 3D synchronization signal comprises identification information corresponding to the polarization switching panel.

10. The three-dimensional image display device of claim 1, further comprising:

a shutter member comprising a left eye shutter and a right eye shutter.

11. The three-dimensional image display device of claim 10, wherein:

the shutter member comprises a second signal receiver, and the signal transmitter and the second signal receiver are synchronized by the 3D synchronization signal.

12. The three-dimensional image display device of claim 11, wherein:

the 3D synchronization signal is synchronized with an open timing of the shutter member or a closed timing of the shutter member.

13. The three-dimensional image display device of claim 10, wherein:

the 3D synchronization signal comprises identification information corresponding to the shutter member.

14. The three-dimensional image display device of claim 13, wherein:

the 3D synchronization signal further comprises identification information corresponding to the polarization switching panel.

15. The three-dimensional image display device of claim 1, wherein:

the display further comprises a backlight unit, and

the display is configured to turn off the backlight unit while displaying a predetermined gray image during a period between the left eye image and the right eye image.

16. The three-dimensional image display device of claim 1, wherein:

the display is one of a liquid crystal display, an organic light emitting diode display, a plasma display panel, or an electrophoretic display.

17. The three-dimensional image display device of claim 15, wherein:

the predetermined gray image is black.

18. A method for displaying a three-dimensional image, comprising:

alternately displaying a left eye image and a right eye image;

transmitting a 3D synchronization signal to a first signal receiver disposed on a polarization switching panel and a second signal receiver disposed on a shutter member;

converting linear polarization into left circular polarization by the polarization switching panel and opening a left eye shutter of the shutter member, concurrently, based on the 3D synchronization signal; and

converting linear polarization into right circular polarization by the polarization switching panel and opening a right eye shutter of the shutter member, concurrently, based on the 3D synchronization signal.

19. The method of claim 18, wherein:

the 3D synchronization signal comprises identification information corresponding to the first and second signal receivers.

20. The method of claim 18, further comprising:

turning off a backlight of a display device while displaying a predetermined gray image during a period between the left eye image and the right eye image.