SEGMENTED PARALLAX BARRIER BASED DISPLAY APPARATUS WITH 2D/3D MODE SWITCHING AND METHOD THEREOF

• US 20140035800A1
• Filed: 08/05/2013
• Published: 02/06/2014
• Est. Priority Date: 08/06/2012
• Status: Abandoned Application

• Current Assignee: Electronics and Telecommunications Research Institute, Young Heuk Cho
• Original Assignee: CNO CO., LTD., Electronics and Telecommunications Research Institute
• Inventors: LEE, Hyun, LEE, Eung Don, CHO, Young Heuk
• Application Number:
  US13/959,352
• Publication Number:
  US 20140035800A1
• Time in Patent Office: Days
• US Class Current: 345/96
• 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: G09G 3/3614 Control of polarity reversal in general
• CPC Class Codes: H04N 13/315 the parallax barriers being time-variant
• CPC Class Codes: H04N 13/359 Switching between monoscopic and stereoscopic modes
• CPC Class Codes: H04N 13/373 for tracking forward-backward translational head movements, i.e. longitudinal movements
• CPC Class Codes: H04N 13/376 for tracking left-right translational head movements, i.e. lateral movements

Abstract

Disclosed are a segmented parallax barrier based display apparatus with 2D/3D mode switching and a method thereof. The parallax barrier based display apparatus may include a first panel reproducing an image; and a second panel positioned on a front surface of the first panel and including a first liquid crystal for forming a parallax barrier that blocks a part of the image reproduced by the first panel and a second liquid crystal for switching polarization of light that transmits the first liquid crystal.

Claims

1. A parallax barrier based display apparatus, comprising:

a first panel reproducing an image; and

a second panel positioned on a front surface of the first panel and including a first liquid crystal for forming a parallax barrier that blocks a part of the image reproduced by the first panel and a second liquid crystal for switching polarization of light that transmits the first liquid crystal.

2. The parallax barrier based display apparatus of claim 1, wherein:

the first liquid crystal and the second liquid crystal operate in a normally white mode to transmit light when voltage is not applied and block light when voltage is applied.

3. The parallax barrier based display apparatus of claim 1, wherein:

the first panel includes,

a backlight irradiating light;

a first polarizer polarizing the light irradiated from the backlight;

a liquid crystal transmitting the light polarized by the first polarizer; and

a second polarizer polarizing the light transmitting the liquid crystal.

4. The parallax barrier based display apparatus of claim 3, wherein:

the second panel further includes a third polarizer polarizing the light transmitting the second liquid crystal in the same direction as the second polarizer.

5. The parallax barrier based display apparatus of claim 1, wherein:

the second panel further includes,

a pair of first transparent electrodes arranged on a front surface and a rear surface of the first liquid crystal based on the first liquid crystal to obliquely deviate from each other in a symmetric pattern to apply driving voltage to the first liquid crystal; and

a pair of second transparent electrodes arranged on a front surface and a rear surface of the second liquid crystal based on the second liquid crystal to apply the driving voltage to the second liquid crystal.

6. The parallax barrier based display apparatus of claim 5, wherein:

the first transparent electrodes include a plurality of patterned indium tin oxides (ITOs) that is separated into at least two groups, and

the second transparent electrode is a plate-like ITO.

7. The parallax barrier based display apparatus of claim 1, further comprising:

a driving unit applying the driving voltage to the second panel in accordance with the position of a user and a watching distance.

8. A display panel, comprising:

a first liquid crystal for forming a parallax barrier that blocks a part of an image reproduced by a panel reproducing an image; and

a second liquid crystal for switching polarization of light that transmits the first liquid crystal.

9. The display panel of claim 8, wherein:

the first liquid crystal and the second liquid crystal are a twisted nematic (TN) liquid crystal that operates in a normally white mode to transmit light when voltage is not applied and block light when voltage is applied.

10. The display panel of claim 8, further comprising:

a polarizer polarizing light transmitting the second liquid crystal in the same direction as a polarizer provided on a front surface of the panel reproducing the image.

11. The display panel of claim 8, further comprising:

a pair of first transparent electrodes arranged on a front surface and a rear surface of the first liquid crystal based on the first liquid crystal to obliquely deviate from each other in a symmetric pattern to apply driving voltage to the first liquid crystal.

12. The display panel of claim 11, wherein:

the first transparent electrodes include a plurality of patterned indium tin oxides (ITOs) that is separated into at least two groups.

13. The display panel of claim 8, further comprising:

a pair of second transparent electrodes arranged on a front surface and a rear surface of the second liquid crystal based on the second liquid crystal to apply the driving voltage to the second liquid crystal.

14. The display panel of claim 13, wherein:

the second transparent electrode is a plate-like patterned indium tin oxide (ITO).

15. A method of displaying an image in a parallax barrier based display apparatus, comprising:

reproducing the image through a first panel; and

applying driving voltage to a second panel positioned on a front surface of the first panel when the display apparatus operates in a 3D mode,

wherein the second panel includes a first liquid crystal for forming a parallax barrier that blocks a part of the image reproduced by the first panel and a second liquid crystal for switching polarization of light that transmits the first liquid crystal.

16. The method of claim 15, wherein:

the first liquid crystal and the second liquid crystal operate in a normally white mode to transmit light when voltage is not applied and block light when voltage is applied.

17. The method of claim 15, wherein:

in the applying of the driving voltage to the second panel, the driving is applied to the first liquid crystal by using a pair of first transparent electrodes arranged on a front surface and a rear surface of the first liquid crystal based on the first liquid crystal to obliquely deviate from each other in a symmetric pattern and the driving voltage is applied to the second liquid crystal by using a pair of second transparent electrodes arranged on a front surface and a rear surface of the second liquid crystal based on the second liquid crystal to apply the driving voltage to the second liquid crystal.

18. The method of claim 17, wherein:

the first transparent electrodes include a plurality of patterned indium tin oxides (ITOs) that is separated into at least two groups, and

the second transparent electrode is a plate-like ITO.

19. The method of claim 18, wherein:

in the applying of the driving voltage to the first liquid crystal, the driving voltage is applied to the first liquid crystal by using a patterned ITO determined in accordance with the position of a user and a watching distance in the plurality of patterned ITOs.

20. The method of claim 15, further comprising:

after the reproducing,

preventing the driving voltage from being applied to the second panel when the display apparatus operates in a 2D mode.