Display device, display system using the same and method for processing image of the display device

• US 9,049,439 B2
• Filed: 08/29/2012
• Issued: 06/02/2015
• Est. Priority Date: 02/24/2012
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Shin, Kwang-Sub, Lee, Baek-Woon
• Primary Examiner(s): HARRIS, DOROTHY H
• Application Number:
  US13/597,746
• Publication Number:
  US 20130222438A1
• Time in Patent Office: 1,007 Days
• Field of Search: 345 7- 8, 359/630
• US Class Current: 1/1
• 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 to receive a first image data signal input from an external source and to generate a second image data signal based on the first image data signal;

a controller 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 for opening and closing a pair of shutter spectacles for each image frame displayed in the display unit; and

a data driver 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, wherein;

the inverse image processor performs a gray-inverting operation on the first image data signal to generate a gray-inverted image data signal, and performs a DC component adding operation on the gray-inverted image data signal to generate the second image data signal, wherein

the DC component adding operation is selectively applied to a data signal corresponding to an edge portion of an object to be displayed.

2. The display device of claim 1, wherein the inverse image processor includes a gray inverter, the gray inverter to perform the gray-inverting operation by calculating an inverse luminance value having an inverse gray corresponding to a luminance value of the first image data signal and by converting 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 a DC component adding unit and a noise generator, the DC component adding unit to perform the DC component adding operation by adding or subtracting a luminance DC component, and the noise generator to perform a noise adding operation by generating and adding luminance noise.

5. The display device of claim 4, wherein the luminance DC component reduces a luminance difference of a data signal corresponding to an edge portion of an object to be displayed.

6. The display device of claim 4, wherein the luminance noise reduces a luminance difference of a data signal corresponding to an edge portion of an object to be displayed.

7. The display device of claim 1, wherein the controller includes a data processor 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 to perform a dithering operation to reduce a luminance difference of a data signal corresponding to an edge portion of an object to be displayed.

9. The display device of claim 1, wherein the controller includes a shutter spectacles controller 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 corresponding to the first image data signal is displayed and closing the shutter spectacles for a frame during which a second image corresponding to the second image data signal is displayed.

10. The display device of claim 1, wherein:

the first image data signal includes a fourth image data signal and a fifth image data signal,

the second image data signal includes a sixth image data signal and a seventh image data signal, the sixth and seventh image data signals generated based on the fourth and fifth image data signals, respectively, and

the third image data signal is arranged by mixing the fourth image data signal, the fifth image data signal, the sixth image data signal, and the seventh image data signal.

11. The display device of claim 10, wherein the controller of the display unit is to generate the driving control signal of the shutter spectacles to open a left-eye shutter of the shutter spectacles, while a fourth image corresponding to the fourth image data signal is displayed, and open a right-eye shutter of the shutter spectacles, while a fifth image corresponding to the fifth image data signal 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 for opening the left-eye shutter of the shutter spectacles, while the fourth image corresponding to the fourth image data signal is displayed; and

a right-eye shutter control signal for opening the right-eye shutter of the shutter spectacles, while the fifth image corresponding to the fifth image data signal is displayed.

13. The display device of claim 11, wherein the driving control signal of the shutter spectacles is for closing the left-eye shutter and the right-eye shutter of the spectacles, while sixth and seventh images corresponding to the sixth and seventh image data signals, respectively, are displayed.

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

15. The display device of claim 1, wherein the inverse image processor performs a noise adding operation on an DC component adding image data signal generated by the DC component adding operation to generate the second image data signal.

16. A display system, comprising:

a data processor 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 data signal input from an external source, and the second image data signal generated based on the first image data signal;

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;

an inverse image processor to receive the first image data signal and to generate the second image data signal based on the first image data signal, the inverse image processor performing a gray-inverting operation on the first image data signal to generate a gray-inverted image data signal, and performing a DC component adding operation on the gray-inverted image data signal to generate the second image data signal;

a pair of shutter spectacles 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 to generate a driving control signal controlling opening and closing of the shutter spectacles and transmitting the driving control signal to the shutter spectacles, wherein

the DC component adding operation is selectively applied to a data signal corresponding to an edge portion of an object to be displayed.

17. The display system of claim 16, wherein the inverse image processor performs the gray-inverting operation by calculating an inverse luminance value having an inverted gray corresponding to a luminance value of the first image data signal and by converting luminance information of the first image data signal.

18. The display system of claim 16, wherein the inverse image processor comprises a DC component adding unit and a noise generator, the DC component adding unit to perform the DC component adding operation by adding or subtracting a luminance DC component, and the noise generator to perform a noise adding operation by generating and adding luminance noise.

19. The display system of claim 16, wherein the data processor is to perform a dithering operation to reduce a luminance difference of a data signal corresponding to an edge portion of an object to be displayed.

20. The display system of claim 16, wherein the driving control signal is for opening the shutter spectacles for a frame during which a first image corresponding to the first image data signal is displayed, and is for closing the shutter spectacles for a frame during which a second image corresponding to the second image data signal is displayed.

21. The display system of claim 16, wherein:

the first image data signal includes a fourth image data signal and a fifth image data signal,

the second image data signal includes a sixth image data signal and a seventh image data signal, the sixth and seventh image data signals generated based on the fourth and fifth image data signals, respectively,

the third image data signal includes a sequence of the fourth image data signal, the sixth image data signal, the fifth image data signal, and the seventh image data signal, and

the shutter spectacles controller is to open a left-eye shutter of the shutter spectacles, while a fourth image corresponding to the fourth image data signal is displayed, and is to open a right-eye shutter of the shutter spectacles, while a fifth image corresponding to the fifth image data signal 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 for opening the left-eye shutter of the shutter spectacles, while a fourth image corresponding to the fourth image data signal is displayed; and

a right-eye shutter control signal for opening the right-eye shutter of the shutter spectacles, while a fifth image corresponding to the fifth image data signal is displayed.

23. The display system of claim 21, wherein the driving control signal of the shutter spectacles is for closing the left-eye shutter and the right-eye shutter of the shutter spectacles, while sixth and seventh images corresponding to the sixth and seventh image data signals, respectively, 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 based on the first image data signal;

detecting a data signal corresponding to an edge portion of an object to be displayed and performing a dithering operation to reduce a luminance difference of the data signals corresponding to the edge portion of the object;

performing a gray-inverting operation on the first image data signal to generate a gray-inverted image data signal, and performing a DC component adding operation on the gray-inverted image data signal to generate the second image data signal;

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, wherein

the DC component adding operation is selectively applied to a data signal corresponding to an edge portion of an object to be displayed.

25. The image processing method of the display device of claim 24, wherein the gray-inverting operation is performed 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 performing a noise adding operation to generate the second image data signal, wherein:

the DC component adding operation is performed by adding and subtracting a luminance DC component, and

the noise adding operation is performed by generating and adding a luminance noise.

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

the first image data signal includes a fourth image data signal and a fifth image data signal,

the second image data signal includes a sixth image data signal and a seventh image data signal, the sixth and seventh image data signals generated based on the fourth and fifth image data signals, respectively, and

the third image data signal is arranged by mixing the fourth image data signal, the fifth image data signal, the sixth image data signal, and the seventh image data signal.