DISPLAY DEVICE, DISPLAY SYSTEM USING THE SAME AND METHOD FOR PROCESSING IMAGE OF THE DISPLAY DEVICE

• US 20130222438A1
• Filed: 08/29/2012
• Published: 08/29/2013
• Est. Priority Date: 02/24/2012
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Baek-Woon Lee, Kwang-Sub Shin
• Inventors: SHIN, Kwang-Sub, LEE, Baek-Woon
• Granted Patent: US 9,049,439 B2
• Time in Patent Office: Days
• US Class Current: 345/690
• CPC Class Codes: G09G 2358/00 Arrangements for display data security
• CPC Class Codes: G09G 3/003 to produce spatial visual effects
• CPC Class Codes: G09G 3/2025 the sub-frames having all the same time duration
• CPC Class Codes: H04N 13/161 Encoding, multiplexing or demultiplexing different image signal components for multi-view video sequence encoding H04N19/597
• CPC Class Codes: H04N 13/341 using temporal multiplexing
• CPC Class Codes: H04N 2013/403 the images being monoscopic

Abstract

A display device includes a display unit including a plurality of pixels connected to a plurality of scan lines and a plurality of data lines, an inverse image processor configured to receive a first image data signal input from an external source and to generate a gray-inverted second image data signal, a controller configured to mix the first image data signal and the second image data signal alternately for each frame to generate a third image data signal, and to generate a driving control signal opening and closing a pair of shutter spectacles for each image frame displayed in the display unit, and a data driver configured to receive the third image data signal from the controller and to apply a corresponding data voltage to each of the plurality of data lines.

Claims

1. A display device, comprising:

a display unit including a plurality of pixels connected to a plurality of scan lines and a plurality of data lines;

an inverse image processor configured to receive a first image data signal input from an external source and to generate a gray-inverted second image data signal;

a controller configured to mix the first image data signal and the second image data signal alternately for each frame to generate a third image data signal, and to generate a driving control signal opening and closing a pair of shutter spectacles for each image frame displayed in the display unit; and

a data driver configured to receive the third image data signal from the controller and to apply a corresponding data voltage to each of the plurality of data lines.

2. The display device of claim 1, wherein the inverse image processor includes a gray inverter, the gray inverter being configured to calculate an inverse luminance value having an inverse gray corresponding to a luminance value of the first image data signal and to convert luminance information of the first image data signal.

3. The display device of claim 2, wherein a sum of the luminance value and the inverse luminance value represents a luminance value of a maximum gray determined according to a number of bits representing a data value of the first image data signal.

4. The display device of claim 2, wherein the inverse image processor further comprises at least one of a DC component adding unit and a noise generator, the DC component adding unit being configured to add or subtract a luminance DC component with respect to a gray-inverted image data signal, and the noise generator being configured to generate and add a noise signal with respect to the gray-inverted image data signal.

5. The display device of claim 4, wherein the DC component adding unit is configured to further add a luminance component that reduces a luminance difference of a data signal corresponding to an edge interface of an object in a displayed image among the image data signal with reference to the edge.

6. The display device of claim 4, wherein the noise generator is configured to further generate and add luminance noise that reduces a luminance difference of a data signal corresponding to an edge interface of an object in a displayed image among the image data signal with reference to the edge.

7. The display device of claim 1, wherein the controller includes a data processor configured to alternately mix the first image data signal and the second image data signal by each frame unit, to generate the third image data signal, and to transmit the third image data signal to the data driver.

8. The display device of claim 7, wherein the data processor is configured to perform dithering to reduce a luminance difference of a data signal corresponding to an edge interface of an object in a displayed image among the second image data signal with reference to the edge.

9. The display device of claim 1, wherein the controller includes a shutter spectacles controller configured to generate and transmit the driving control signal to the shutter spectacles, the driving control signal opening the shutter spectacles for a frame during which a first image according to the first image data signal among the displayed image according to the third image data signal is displayed and closing the shutter spectacles for a frame during which a second image according to the second image data signal among the displayed image according to the third image data signal is displayed.

10. The display device of claim 1, wherein the first image data signal and the second image data signal respectively includes a first view-point image data signal and a second view-point image data signal, and

the third image data signal is arranged by mixing sequentially a first image data signal of a first view point, a second image data signal of the first view point, a first image data signal of a second view point, and a second image data signal of the second view point.

11. The display device of claim 10, wherein the controller of the display unit is configured to generate the driving control signal of the shutter spectacles to open a left-eye shutter of the shutter spectacles, while an image according to the first image data signal of the first view-point is displayed, and open a right-eye shutter of the shutter spectacles, while an image according to the first image data signal of the second view point is displayed.

12. The display device of claim 11, wherein the driving control signal of the shutter spectacles includes:

a left-eye shutter control signal configured to open the left-eye shutter of the shutter spectacles, while the image according to the first image data signal of the first view-point is displayed; and

a right-eye shutter control signal configured to open the right-eye shutter of the shutter spectacles, while an image according to the first image data signal of the second view-point is displayed.

13. The display device of claim 11, wherein the driving control signal of the shutter spectacles is configured to close the left-eye shutter and the right-eye shutter of the spectacles, while images according to the second image data signal of the first view-point and the second image data signal of the second view-point are displayed.

14. The display device of claim 1, wherein the controller includes a timing controller configured to generate and transmit a control signal configured to control driving of the display unit and the data driver according to a synchronization signal input from an external source.

15. A display system, comprising:

a data processor configured to generate a third image data signal formed by alternately mixing a first image data signal and a second image data signal by each image frame, the first image being data signal input from an external source, and the second image signal being a gray-inverted first image;

a display unit including a plurality of pixels displaying an image by emitting light with a driving current corresponding to the third image data signal;

a pair of shutter spectacles configured to open and close by each image frame unit displayed in the display unit to control transmission of the displayed image; and

a shutter spectacle controller configured to generate a driving control signal controlling opening and closing of the shutter spectacles and transmitting the driving control signal to the shutter spectacles.

16. The display system of claim 15, further comprising an inverse image processor configured to receive the first image data signal and to generate the second image data signal by inverting a gray of the first image data signal.

17. The display system of claim 16, wherein the inverse image processor is configured to calculate an inverse luminance value having an inverted gray corresponding to a luminance value of the first image data signal to convert luminance information of the first image data signal.

18. The display system of claim 16, wherein the inverse image processor further comprises at least one of a DC component adding unit and a noise generator, the DC component adding unit being configured to add or subtract a luminance DC component with respect to the gray-inverted image data signal, and the noise generator being configured to generate and add a noise signal with respect to the gray-inverted image data signal.

19. The display system of claim 15, wherein the data processor is configured to perform dithering to reduce a luminance difference of a data signal corresponding to an edge interface of an object in a displayed image among the second image data signal with reference to the edge.

20. The display system of claim 15, wherein the driving control signal is configured to open the shutter spectacles for a frame during which a first image according to the first image data signal among the displayed image according to the third image data signal is displayed, and is configured to close the shutter spectacles for a frame during which a second image according to the second image data signal among the displayed image according to the third image data signal is displayed.

21. The display system of claim 15, wherein:

the first image data signal and the second image data signal include a first view-point image data signal and a second view-point image data signal, respectively,

the third image data signal includes a sequence of a first image data signal of the first view-point, a second image data signal of the first view-point, a first image data signal of the second view-point, and a second image data signal of the second view-point, and

the shutter spectacles controller is configured to open a left-eye shutter of the shutter spectacles, while an image according to the first image data signal of the first view-point is displayed, and is configured to open a right-eye shutter of the shutter spectacles, while an image according to the first image data signal of the second view-point is displayed.

22. The display system of claim 21, wherein the driving control signal of the shutter spectacles includes:

a left-eye shutter control signal configured to open the left-eye shutter of the shutter spectacles, while an image according to the first image data signal of the first view-point is displayed; and

a right-eye shutter control signal configured to open the right-eye shutter of the shutter spectacles, while an image according to the first image data signal of the second view-point is displayed.

23. The display system of claim 21, wherein the driving control signal of the shutter spectacles is configured to close the left-eye shutter and the right-eye shutter of the shutter spectacles, while images according to the second image data signal of the first view-point and the second image data signal of the second view-point are displayed.

24. An image processing method of a display device, the method comprising:

receiving a first image data signal from an external source;

generating a second image data signal by inverting a gray of the first image data signal;

detecting a data signal corresponding to an edge interface of an object in a displayed image in the second image data signal and performing dithering to reduce a luminance difference of the data signals with reference to the edge;

generating a third image data signal by alternately mixing the first image data signal and the second image data signal by each frame unit; and

outputting the third image data signal to a plurality of pixels of a display unit to display the corresponding image.

25. The image processing method of the display device of claim 24, wherein the gray-inverted second image data signal is generated by calculating an inverse luminance value having an inverted gray corresponding to the first image data signal and converting luminance information of the first image data signal.

26. The image processing method of the display device of claim 24, further comprising, after generating the gray-inverted second image data signal, adding and subtracting a luminance DC component with respect to the gray-inverted second image data signal, and/or generating and adding a noise signal with respect to the gray-inverted second image data signal.

27. The image processing method of the display device of claim 24, wherein:

the first image data signal and the second image data signal include a first view-point image data signal and a second view-point image data signal, respectively, and

the third image data signal is arranged by sequentially mixing a first image data signal of a first view point, a second image data signal of the first view point, a first image data signal of a second view point, and a second image data signal of the second view point.