DISPLAY DEVICE, BARRIER DEVICE, BARRIER DRIVING CIRCUIT, AND BARRIER DEVICE DRIVING METHOD

• US 20120307170A1
• Filed: 05/24/2012
• Published: 12/06/2012
• Est. Priority Date: 05/31/2011
• Status: Abandoned Application

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Inoue, Yuichi, Kanai, Chiaki
• Application Number:
  US13/479,718
• Publication Number:
  US 20120307170A1
• Time in Patent Office: Days
• US Class Current: 349/37
• CPC Class Codes: G09G 3/003 to produce spatial visual effects
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence

Abstract

A barrier driving circuit includes a barrier driving section that supplies drive signals to two or more liquid crystal barriers that are adjacent to each other and to be placed into a closed state among a plurality of liquid crystal barriers. The plurality of liquid crystal barriers are disposed side-by-side and each of the liquid crystal barriers is switchable between an open state and the closed state. The drive signals supplied to the two or more liquid crystal barriers have respective polarities that are same with respect to one another.

Claims

1. A display device, comprising:

a display section;

a barrier section including a plurality of liquid crystal barriers that are disposed side-by-side, each of the liquid crystal barriers being switchable between an open state and a closed state; and

a barrier driving section supplying drive signals to two or more liquid crystal barriers that are adjacent to each other and to be placed into the closed state among the plurality of liquid crystal barriers, the drive signals supplied to the two or more liquid crystal barriers having respective polarities that are same with respect to one another.

2. The display device according to claim 1, wherein the plurality of liquid crystal barriers include a plurality of first liquid crystal barriers and a plurality of second liquid crystal barriers, the first liquid crystal barriers and the second liquid crystal barriers extending in a first direction and being provided alternately in a direction intersecting the first direction.

3. The display device according to claim 2, wherein

the first liquid crystal barriers are grouped into a plurality of barrier groups, and

the barrier driving section drives the first liquid crystal barriers, in turn between the barrier groups in a first period, to be in the open state or the closed state, and drives the second liquid crystal barriers to be in the closed state.

4. The display device according to claim 3, wherein

the drive signals include a plurality of first drive signals and a second drive signal, the first drive signals being mutually different for each of the barrier groups, and each of the first and the second drive signals being a signal whose polarity makes transition, and

the barrier driving section supplies the first drive signals to the first liquid crystal barriers and supplies the second drive signal to each of the second liquid crystal barriers.

5. The display device according to claim 4, wherein the polarity of each of the first drive signals, supplied to the first liquid crystal barriers that are to be placed into the closed state, is same as the polarity of the second drive signal supplied to each of the second liquid crystal barriers that are to be placed into the closed state.

6. The display device according to claim 5, wherein a voltage of each of the first drive signals, supplied to the first liquid crystal barriers that are to be placed into the closed state, is substantially same as a voltage of the second drive signal supplied to each of the second liquid crystal barriers that are to be placed into the closed state.

7. The display device according to claim 5, wherein amplitude of each of the first drive signals, supplied to the first liquid crystal barriers that are to be placed into the closed state, is substantially smaller than amplitude of the second drive signal supplied to each of the second liquid crystal barriers that are to be placed into the closed state.

8. The display device according to claim 4, wherein the polarity of the second drive signal reverses for each second period that is shorter than the first period.

9. The display device according to claim 4, wherein the second drive signal includes a partial drive waveform whose polarity reverses for each second period that is shorter than the first period, and the partial drive waveform inverts for each of the first periods.

10. The display device according to claim 4, wherein the polarity of the second drive signal reverses for each of the first periods.

11. The display device according to claim 4, wherein a period during which the first liquid crystal barriers, belonging to a first barrier group of the plurality of barrier groups, are in the open state is partially overlapped with a period during which the first liquid crystal barriers belonging to a second barrier group of the plurality of barrier groups are in the open state.

12. The display device according to claim 4, wherein the first drive signals include:

a first waveform portion by which the first liquid crystal barriers are placed into the closed state;

a second waveform portion by which the first liquid crystal barriers are placed into the open state; and

a third waveform portion provided substantially after the first waveform portion and substantially before the second waveform portion.

13. The display device according to claim 12, wherein the second drive signal includes a waveform portion that corresponds to the first waveform portion, and a waveform portion that corresponds to the third waveform portion.

14. The display device according to claim 3, wherein a plurality of displaying modes are included, the displaying modes including a three-dimensional image displaying mode and a two-dimensional image displaying mode, and

the display section displays a plurality of different perspective images in the three-dimensional image displaying mode.

15. The display device according to claim 2, wherein a plurality of displaying modes are included, the displaying modes including a three-dimensional image displaying mode and a two-dimensional image displaying mode, and

the display section displays a single perspective image, and the barrier driving section drives the first liquid crystal barriers and the second liquid crystal barriers to be in the open state in the two-dimensional image displaying mode.

16. The display device according to claim 1, wherein

the liquid crystal barriers extend in a first direction, and are grouped into a plurality of barrier groups, and

the barrier driving section drives the liquid crystal barriers, in turn between the barrier groups in a first period, to be in the open state or the closed state.

17. The display device according to claim 16, wherein the barrier driving section supplies the liquid crystal barriers with the drive signals, that are mutually different for each of the barrier groups and each of which is a signal whose polarity makes transition.

18. The display device according to claim 17, wherein the drive signals, supplied to the liquid crystal barriers that are to be placed into the closed state, are same in polarity as the drive signals supplied to the liquid crystal barriers adjacent thereto that are to be placed into the closed state.

19. The display device according to claim 18, wherein the drive signals, supplied to the liquid crystal barriers that are to be placed into the closed state, are same in voltage as the drive signals supplied to the liquid crystal barriers adjacent thereto that are to be placed into the closed state.

20. The display device according to claim 17, wherein each of the drive signals makes the transition for each second period that is shorter than the first period.

21. The display device according to claim 17, wherein the drive signals include:

a first waveform portion by which the liquid crystal barriers are placed into the closed state;

a second waveform portion by which the liquid crystal barriers are placed into the open state; and

a third waveform portion provided substantially after the first waveform portion and substantially before the second waveform portion.

22. The display device according to claim 1, wherein each of the liquid crystal barriers opens and closes based on a potential difference between the drive signal and a common signal.

23. The display device according to claim 22, wherein the common signal is a direct-current signal.

24. The display device according to claim 22, wherein the common signal is an alternating-current signal.

25. The display device according to claim 22, wherein a transmittance in each of the liquid crystal barriers decreases as the potential difference increases.

26. The display device according to claim 1, further comprising a backlight, wherein the display section is a liquid crystal display section disposed between the backlight and the barrier section.

27. The display device according to claim 1, further comprising a backlight, wherein the display section is a liquid crystal display section, and the barrier section is disposed between the backlight and the liquid crystal display section.

28. A barrier device, comprising:

a barrier section including a plurality of liquid crystal barriers that are disposed side-by-side, each of the liquid crystal barriers being switchable between an open state and a closed state; and

a barrier driving section supplying drive signals to two or more liquid crystal barriers that are adjacent to each other and to be placed into the closed state among the plurality of liquid crystal barriers, the drive signals supplied to the two or more liquid crystal barriers having respective polarities that are same with respect to one another.

29. A barrier driving circuit, comprising:

a barrier driving section supplying drive signals to two or more liquid crystal barriers that are adjacent to each other and to be placed into a closed state among a plurality of liquid crystal barriers, the plurality of liquid crystal barriers being disposed side-by-side and each of the liquid crystal barriers being switchable between an open state and the closed state, and the drive signals supplied to the two or more liquid crystal barriers having respective polarities that are same with respect to one another.

30. A barrier device driving method, comprising:

generating drive signals supplied to two or more liquid crystal barriers that are adjacent to each other and to be placed into a closed state among a plurality of liquid crystal barriers, the plurality of liquid crystal barriers being disposed side-by-side and each of the liquid crystal barriers being switchable between an open state and the closed state, and the drive signals supplied to the two or more liquid crystal barriers having respective polarities that are same with respect to one another; and

driving the two or more liquid crystal barriers by supplying the two or more liquid crystal barriers with the generated drive signals.