3D display panel and 3D display apparatus using the same and driving method thereof

Patent metadata

Field	Value
Publication number	US-9325980-B2
Application number	US-201113267502-A
Country	US
Kind code	B2
Filing date	Oct 6, 2011
Priority date	Oct 6, 2010
Publication date	Apr 26, 2016
Grant date	Apr 26, 2016

Abstract

A three-dimensional (3D) display panel, a 3D display apparatus using the same, and a driving method thereof are provided. The 3D display apparatus includes: an image display panel which displays an image; a phase shift panel which alternately shifts a polarization direction of light outputted from the image display panel; a backlight unit which provides a backlight; and a control unit which turns off the backlight unit during a crosstalk period where the phase shift panel performs the shift operation and to turn on the backlight unit for a stabilization period after the crosstalk period.

First claim

What is claimed is:

1. A three-dimensional (3D) display apparatus, comprising:
an image display panel which outputs one image frame per data enable section;
a phase shift panel which performs a shift operation by a unit of a frame, which is more than one data enable section, to alternately shift a polarization direction of light outputted from the image display panel;
a backlight unit which provides a backlight for the image display panel; and
a control unit which turns off the backlight unit during a crosstalk period when the phase shift panel performs the shift operation and which turns on the backlight unit during a stabilization period after the crosstalk period,
wherein for a sequence of three data enable sections, the backlight unit is turned on once for a left eye unit of a frame and once for a right eye unit of a frame.

2. The apparatus of claim 1 , further comprising:
a phase shift panel driving unit which overdrives the phase shift panel for a predetermined period of time from a point of time when the phase shift panel begins the shift operation.

3. The apparatus of claim 2 , wherein the phase shift panel driving unit overdrives the phase shift panel by controlling to apply an overdrive voltage to the phase shift panel for the predetermined period of time, and controls to apply a maintenance voltage, less than the overdrive voltage, to the phase shift panel from an end of the predetermined period of time until the stabilization period ends.

4. The apparatus of claim 1 , wherein an operating frequency of the phase shift panel is 120 Hz, and an operating frequency of the image display panel is 180 Hz, 240 Hz, 360 Hz, or 480 Hz.

5. The apparatus of claim 1 , wherein the image display panel alternately outputs a left eye image and a right eye image, and the phase shift panel shifts the polarization direction of the light to a first polarization state from a point of time when the left eye image beings to be displayed and shifts the polarization direction to a second polarization state, vertical to the first polarization state, from a point of time when the right eye image begins to be displayed.

6. The apparatus of claim 1 , wherein an operating frequency of the phase shift panel is lower than that of the image display panel so that a stabilization period over a certain length of time is established.

7. The apparatus of claim 1 , wherein the phase shift panel performs the shift operation each time a frame is output.

8. A three-dimensional (3D) display panel, comprising:
an image display panel which outputs one image frame per data enable section;
a phase shift panel which performs a shift operation by a unit of a frame, which is more than one data enable section, to shift a polarization direction of light outputted from the image display panel to a first polarization state from a point of time when a left eye image begins to be displayed and shifts the polarization direction of the light to a second polarization state from a point of time when a right eye image begins to be displayed; and
a backlight unit operable to be turned off during a crosstalk period when the phase shift panel performs the shift operation and to be turned on during a stabilization period after the crosstalk period,
wherein for a sequence of three data enable sections. the backlight unit is turned on once for a left eye unit of a frame and once for a right eye unit of a frame.

9. The panel of claim 8 , wherein the phase shift panel is overdriven for a predetermined period time from a point of time when the phase shift panel begins the shift operation.

10. The panel of claim 8 , wherein an operating frequency of the phase shift panel is 120 Hz, and an operating frequency of the image display panel is 180 Hz, 240 Hz, 360 Hz or 480 Hz.

11. The panel of claim 8 , wherein the phase shift panel comprises a first polarizer which shifts the polarization direction of the light to the first polarization state and a second polarizer, adjacent to the first polarizer, which shifts the polarization direction of the light to the second polarization state.

12. The panel of claim 8 , wherein the phase shift panel is a polarizer, a liquid crystal panel, or a film.

13. The panel of claim 8 , wherein:
the shift operation begins approximately when a drive voltage is applied to the phase shift panel to change a state of the phase shift panel from a first state, in which the light is output in the first polarization state, to a second state, in which the light is output in the second polarization state; and
the shift operation ends approximately when the phase shift panel reaches the second state.

14. A driving method of a backlight unit for a three-dimensional (3D) display apparatus having an image display panel that outputs one image frame per data enable section, and a phase shift panel which performs a shift operation by a unit of a frame, which is more than one data enable section, to alternately shift a polarization direction of light outputted from the image display panel, the method comprising:
turning off the backlight unit during a crosstalk period when the phase shift panel performs the shift operation; and
turning on the backlight unit when the image display panel finishes the phase shift operation to enter a stabilization period,
wherein the turning off the backlight unit comprises turning off the backlight unit during the crosstalk period where both a left eye image and a right eye image is displayed, and
wherein for a sequence of three; data enable sections. the turning on the backlight unit includes turning on the backlight unit once for a. left ye unit of a frame once for a right eye unit of a frame.

15. The method of claim 14 , further comprising:
overdriving the phase shift panel for a predetermined period of time when the phase shift panel begins the shift operation.

16. The method of claim 14 , further comprising:
alternately displaying a left eye image and a right eye image on the image display panel; and
shifting the polarization direction of the light to a first polarization state from a point of time when the left eye image begins to be displayed and shifting the polarization direction of the light to a second polarization state, vertical to the first polarization state, from a point of time when the right eye image begins to be displayed.

17. A computer readable recording medium having recorded thereon a program executable by a computer for performing the method of claim 14 .

18. A backlight unit for a three-dimensional (3D) display apparatus having an image display panel that outputs one image frame per data enable section, and a phase shift panel which performs a shift operation by a unit of a frame, which is more than one data enable section, to alternately shift a polarization direction of light outputted from the image display panel, the backlight unit comprising:
a light source which provides a backlight for the image display panel; and
a control unit which turns off the light source during a crosstalk period corresponding to when the phase shift panel performs the shift operation, and which turns on the light source during a stabilization period after the crosstalk period,
wherein for a sequence of three data enable sections, the backlight unit is turned on once for a left eye unit of a frame and once for a right eye unit of a frame.

19. A three-dimensional (3D) display control apparatus for controlling a 3D display apparatus having an image display panel that outputs one image frame per data enable section, a phase shift panel w

Assignees

• Jung Jong-Hoon
• Kim Dae-Sik
• Cha Kyung-Hoon
• Lee Ho-Seop
• Ko Young-Ji
• Samsung Electronics Co Ltd

Inventors

• Jung Jong-Hoon
• Kim Dae-Sik
• Cha Kyung-Hoon
• Lee Ho-Seop
• Ko Young-Ji

Classifications

• H04N13/398

  Synchronisation thereof; Control thereof · CPC title

• H04N13/341 Primary

  using temporal multiplexing · CPC title

• G02B30/25

  using polarisation techniques · CPC title

• G09G3/003 Primary

  to produce spatial visual effects · CPC title

• H04N13/30

  Image reproducers (optical systems for producing stereoscopic or other three-dimensional [3D] effects G02B30/00) · CPC title