Three-dimensional image display device

• US 8,537,101 B2
• Filed: 06/30/2011
• Issued: 09/17/2013
• Est. Priority Date: 11/19/2010
• Status: Expired due to Fees

• Current Assignee: Samsung Display Company Limited (Samsung Group)
• Original Assignee: Samsung Display Company Limited (Samsung Group)
• Inventors: Kim, Yun-Jae, Choi, Kyung-Uk, Moon, Seung Hwan, Goo, Nam-Hee, Kim, Myoung-Chul, Kim, Bo-Ram, Lee, Jong-Yoon, Lee, Byoung Jun
• Primary Examiner(s): Cheng, Joe H
• Application Number:
  US13/173,283
• Publication Number:
  US 20120126720A1
• Time in Patent Office: 810 Days
• Field of Search: 345/102, 345/204, 345/209, 345/419, 348/42, 348/51, 348/56, 349/15, 315/307, 359/464
• US Class Current: 345/102
• CPC Class Codes: G09G 3/003 to produce spatial visual effects
• 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 luminance controller receiving a three-dimensional enable signal, a backlight data signal and at least one starting signal of a scan starting signal, a vertical blank starting signal and a backlight starting signal. The luminance controller outputs a backlight control signal and a backlight unit is operated based on the backlight control signal and is coupled to the luminance controller. The backlight data signal is based on a previous pulse of the starting signal and is applied from a first time when a current pulse of the starting signal starts to a second time when a next pulse of the starting signal starts.

Claims

1. A three-dimensional image display device, comprising:

a luminance controller which receives a three-dimensional enable signal, a backlight data signal and at least one starting signal of a scan starting signal, a vertical blank starting signal and a backlight starting signal, and outputs a backlight control signal; and

a backlight unit operated based on the backlight control signal and coupled to the luminance controller,

wherein the control signal applied from a first time when a current pulse of the starting signal starts to a second time when a next pulse of the starting signal starts is based on the backlight data signal corresponding to a previous pulse of the starting signal.

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

the scan starting signal comprises a first pulse informing a starting of every frame.

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

the backlight data signal is data of a bit unit and the backlight data signal is 0 or 2<sup>n−

1</sup>, wherein n is a natural number.

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

the vertical blank starting signal comprises a first pulse and a second pulse informing a starting of a vertical blank.

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

the backlight data signal based on the first pulse is 0 and the backlight data signal based on the second pulse is 2<sup>n−

1</sup>, wherein n is a natural number.

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

the backlight starting signal comprises the first pulse and a third pulse and a timing of the third pulse is earlier or later than the starting of a vertical blank.

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

the backlight data signal based on the first pulse is 0 and the backlight data signal based on the third pulse is 2<sup>n−

1</sup>, wherein n is a natural number.

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

the backlight data signal includes any one of values from about 10 percent of 2<sup>n−

1</sup> to about 50 percent of 2<sup>n−

1</sup>, wherein n is a natural number.

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

the backlight data signal is based on the first pulse.

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

the luminance controller is an off-duty type luminance controller.

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

the backlight starting signal comprises a fourth pulse and a timing of the fourth pulse is earlier or later than a starting of a vertical blank.

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

the backlight starting signal is based on the fourth pulse.

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

the luminance controller is an on-duty type luminance controller.

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

a magnitude in a current flowing in the backlight unit when the three-dimensional enable signal is in a high level is greater than the magnitude in a current flowing in the backlight unit when the three-dimensional enable signal is in a low level.

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

the three-dimensional image display device comprises a switching member comprising a first switch connected to a first resistor and a second switch connected to a second resistor, and

when the three-dimensional enable signal is in a high level, the first switch and the second switch are turned-on.

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

when the three-dimensional enable signal is in a low level, the first switch is turned-on and the second switch is turned-off.

17. The three-dimensional image display device of claim 1, further comprising a gate driver integrated into a display device alternately displaying a left eye image and a right eye image and

the vertical blank starting signal resets a gate driver.

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

the gate driver comprises a plurality of stages connected to each other, the plurality of stages comprise a dummy stage and the vertical blank starting signal is applied to the dummy stage.

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

a magnitude in a current flowing in the backlight unit when the three-dimensional enable signal is in a high level is greater than the magnitude in a current flowing in the backlight unit when the three-dimensional enable signal is in a low level.

20. The three-dimensional image display device of claim 19, further comprising a switching member comprising a first switch connected to a first resistor and a second switch connected to a second resistor, and

when the three-dimensional enable signal is in a high level, the first switch and the second switch are turned-on.