High resolution 2D-3D switchable autostereoscopic display apparatus

• US 20070200792A1
• Filed: 12/07/2006
• Published: 08/30/2007
• Est. Priority Date: 02/27/2006
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Tae-hee, Jung, Sung-yong, Kim, Dae-sik
• Granted Patent: US 8,373,684 B2
• Time in Patent Office: Days
• US Class Current: 345/7
• CPC Class Codes: G09G 3/3413 Details of control of colour illumination sources
• CPC Class Codes: H04N 13/312 the parallax barriers being placed behind the display panel, e.g. between backlight and spatial light modulator [SLM]
• CPC Class Codes: H04N 13/315 the parallax barriers being time-variant
• CPC Class Codes: H04N 13/32 using arrays of controllable light sources; using moving apertures or moving light sources
• CPC Class Codes: H04N 13/359 Switching between monoscopic and stereoscopic modes

Abstract

Provided is a high resolution 2D-3D switchable autostereoscopic display apparatus including: a backlight unit emitting light; a spatial light modulator comprising a plurality of cells, the cells being arranged two-dimensionally and comprising left eye regions and right eye regions that are each independently switchable between a transparent state and an opaque state; a lenticular lens sheet separating and emitting light passed through the spatial light modulator to a left eye viewing zone and a right eye viewing zone; and an image display panel displaying an image, wherein the spatial light modulator is divided into a plurality of horizontal segments that are sequentially switched in synchronization with a vertical synchronization signal of the image display panel.

Claims

1. A high resolution 2D-3D switchable autostereoscopic display apparatus comprising:

a backlight unit emitting light;

a spatial light modulator comprising a plurality of cells, the cells being arranged two-dimensionally and comprising left eye regions and right eye regions that are each independently switchable between a transparent state and an opaque state;

a lenticular lens sheet separating and emitting light passed through the spatial light modulator to a left eye viewing zone and a right eye viewing zone; and

an image display panel displaying an image,

wherein the spatial light modulator is divided into a plurality of horizontal segments that are sequentially switched in synchronization with a vertical synchronization signal of the image display panel.

2. The apparatus of claim 1, wherein the spatial light modulator is a transmissive liquid crystal device that includes electrodes having a parallax barrier pattern that correspond to the cells, and liquid crystal controlled according to a voltage applied to the electrodes.

3. The apparatus of claim 1, wherein each of the horizontal segments of the spatial light modulator is a horizontal array of cells of the spatial light modulator.

4. The apparatus of claim 3, wherein each of the horizontal segments of the spatial light modulator corresponds to a plurality of horizontal pixel lines of the image display panel.

5. The apparatus of claim 4, wherein the backlight unit is divided into a plurality of horizontal segments that are independently driven.

6. The apparatus of claim 5, wherein the number of horizontal segments of the backlight unit is equal to the number of horizontal segments of the spatial light modulator.

7. The apparatus of claim 6, wherein each of the horizontal segments of the backlight unit is switched simultaneously with the corresponding horizontal segment of the spatial light modulator.

8. The apparatus of claim 1, wherein the lenticular lens sheet comprises a plurality of vertical lenticular lenses which are parallel to vertical lines of cells of the spatial light modulator and arranged in a horizontal direction.

9. The apparatus of claim 8, wherein a pitch between the vertical lenticular lenses is equal to or less than a pitch between the vertical cell lines.

10. The apparatus of claim 8, wherein the distance between the lenticular lens sheet and the spatial light modulator is equal to or greater than the focal distance of each of the vertical lenticular lenses.

11. The apparatus of claim 1, wherein the image display panel alternately and sequentially displays a right eye image and a left eye image in a3D mode.

12. The apparatus of claim 11, wherein:

when pixel lines of the image display panel that correspond to each horizontal segment of the spatial light modulator display a right eye image, the right eye regions of the cells of each horizontal segment are switched to a transparent state and the left eye regions of the cells of each horizontal segment are switched to an opaque state; and

when pixel lines of the image display panel that correspond to each horizontal segment of the spatial light modulator display a left eye image, the right eye regions of the cells of each horizontal segment are switched to an opaque state and the left eye regions of the cells of each horizontal segment are switched to a transparent state.

13. The apparatus of claim 12, wherein the backlight unit is divided into a plurality of horizontal segments which are driven independently, and each of the horizontal segments is switched on while the corresponding pixel lines of the image display panel are all displaying a right eye image or a left eye image and switched off while the corresponding pixel lines are converting between the left and right eye images.

14. The apparatus of claim 1, wherein when the image display panel is in a 2D mode, both the left and right eye regions of each of the cells of the spatial light modulator are switched to a transparent state.

15. The apparatus of claim 1, wherein the image display panel is a liquid crystal panel.