3-dimensional image display device

1. A 3-dimensional image display device, comprising:

a signal controller including a reference gamma data generator to correct and output image data;

a data driver including a gray voltage generator to generate a gray voltage according to an output of the reference gamma data generator, and to receive the image data corrected by the signal controller;

a display panel including a plurality of pixels, the display panel to display a left eye image and a right eye image based on a data voltage output from the data driver; and

glasses including a left-eye lens and a right-eye lens controlled by a glasses synchronization signal from the signal controller, wherein

the signal controller compensates for a difference of charging rates of the left eye image and the right eye image based on the glasses synchronization signal by applying different lookup tables included in a plurality of lookup tables on the left eye image and the right eye image, respectively, the difference of the charging rates of the left eye image and the right eye image being caused by a polarity inversion driving of the pixels, wherein:

a polarity of the data voltage applied to the display panel is inversed for predetermined frames,

one image between the left eye image and the right eye image, applied with the polarity inversion, is an inversion compensation image, and

another image between the left eye image and the right eye image, applied without the polarity inversion, is a non-inversion compensation image, and wherein

the inversion compensation image and the non-inversion compensation image are compensated by applying the different lookup tables, respectively.

2. The device as claimed in claim 1 , wherein:

the plurality of lookup tables include a lookup table for a 2-dimensional image and a lookup table for a 3-dimensional image, and

the signal controller uses the different lookup tables, selected between the lookup table for the 2-dimensional image and the lookup table for the 3-dimensional image of the reference gamma data generator, for the left eye image and the right eye image, respectively, based on the glasses synchronization signal such that the difference of the charging rates of the left eye image and the right eye image is compensated.

3. The device as claimed in claim 2 , wherein

the reference gamma data generator generates reference gamma data according to the lookup table for the 2-dimensional image in order to compensate for a charging rate of the inversion compensation image.

4. The device as claimed in claim 3 , wherein the reference gamma data generator includes:

a selector to select a lookup table, other than the lookup table for the 2-dimensional image and the lookup table for the 3-dimensional image,

an output unit to output the lookup table selected by the selector,

an OR logic circuit unit to receive the glasses synchronization signal and the option signal, and

an AND logic circuit unit to receive an output of the OR logic circuit unit and a 3-dimensional image display selection signal, and to output the received output of the OR logic circuit unit and 3-dimensional image display selection signal to the selector.

5. The device as claimed in claim 4 , wherein the reference gamma data generator is to:

generate the reference gamma data by selecting the lookup table for the 2-dimensional image when a 2-dimensional image is displayed,

select the lookup table for the 2-dimensional image to generate the reference gamma data, when a 3-dimensional image is displayed and the inversion compensation image is displayed, and

select the lookup table for the 3-dimensional image to generate the reference gamma data when the 3-dimensional image is displayed and the non-inversion compensation image is displayed.

6. The device as claimed in claim 5 , wherein:

when the 3-dimensional image is applied at 120 Hz, the left eye image and the right eye image are alternately applied, and

when the 3-dimensional image is applied at 240 Hz, the left eye image, the left eye image, the right eye image, and the right eye image are alternately applied, or the left eye image, a black image, the right eye image, and the black image are alternately applied.

7. The device as claimed in claim 1 , wherein:

the plurality of lookup tables include one lookup table for a 2-dimensional image and a first lookup table for the 3-dimensional image and a second lookup table for the 3-dimensional image, which are two lookup tables for a 3-dimensional image, and

the signal controller uses the different lookup tables, selected between the two lookup tables for the 3-dimensional image of the reference gamma data generator, the different lookup tables are different according to the left eye image and the right eye image, based on the glasses synchronization signal such that the difference of the charging rates of the left eye image and the right eye image is compensated.

8. The device as claimed in claim 7 , wherein:

the reference gamma data generator generates:

reference gamma data according to the first lookup table for the 3-dimensional image in order to compensate for a charging rate of the non-inversion compensation image, and

reference gamma data according to the second lookup table for the 3-dimensional image in order to compensate for a charging rate of the inversion compensation image.

9. The device as claimed in claim 8 , wherein the reference gamma data generator includes:

a selector to select a lookup table, other than the lookup table for the 2-dimensional image and the two lookup tables for the 3-dimensional image,

an output unit to output the lookup table selected by the selector,

an OR logic circuit unit to receive the glasses synchronization signal and the option signal, and

an AND logic circuit unit to receive an output of the OR logic circuit unit and a 3-dimensional image display selection signal, and to output the received output of the OR logic circuit unit and 3-dimensional image display selection signal to the selector.

10. The device as claimed in claim 9 , wherein the reference gamma data generator is to:

generate the reference gamma data by selecting the lookup table for the 2-dimensional image when a 2-dimensional image is displayed,

select the second lookup table for the 3-dimensional image to generate the reference gamma data when the 3-dimensional image is displayed and the inversion compensation image is displayed, and

select the first lookup table for the 3-dimensional image to generate the reference gamma data when the 3-dimensional image is displayed and the non-inversion compensation image is displayed.

11. The device as claimed in claim 10 , wherein:

when the 3-dimensional image is applied at 120 Hz, the left eye image and the right eye image are alternately applied, and

when the 3-dimensional image is applied at 240 Hz, the image for the left eye, the left eye image, the right eye image, and the right eye image are alternately applied, or the left eye image, a black image, the right eye image, and the black image are alternately applied.

12. The device as claimed in claim 1 , wherein:

the signal controller includes an ACC unit to correct the image data input from the outside considering a gamma characteristic of each color, and

the ACC unit includes one ACC lookup table for a 2-dimensional image, a first ACC lookup table for the 3-dimensional image, and a second ACC lookup table for the 3-dimensional image, and

the signal controller uses an ACC lookup table, selected between the two ACC lookup tables for the 3-dimensional image of the ACC unit which are different between the left eye image and the right eye image, based on the glasses synchronization signal such that the difference of the charging rates of the left eye image and the right eye image is compensated.

13. The device as claimed in claim 12 , wherein:

the ACC unit corrects the image data according to the first ACC lookup table for the 3-dimensional image in order to compensate for a charging rate of the non-inversion compensation image, and

the ACC unit corrects the image data according to the second ACC lookup table for the 3-dimensional image in order to compensate for a charging rate of the compensation image.

14. The device as claimed in claim 13 , wherein the ACC unit includes:

a selector to select a lookup table, other than the ACC lookup table for the 2-dimensional image and the two ACC lookup tables for the 3-dimensional image,

an output unit to output the lookup table selected by the selector,

an OR logic circuit unit to receive the glasses synchronization signal and the option signal, and

an AND logic circuit unit to receive an output of the OR logic circuit unit and a 3-dimensional image display selection signal, and output the received output of the OR logic circuit unit and 3-dimensional image display selection signal to the selector.

15. The device as claimed in claim 14 , wherein the ACC unit:

corrects the image data by selecting the ACC lookup table for the 2-dimensional image when the 2-dimensional image is displayed,

selects the second ACC lookup table for the 3-dimensional image to correct the image data when the 3-dimensional image is displayed and the compensation image is displayed, and

selects the first ACC lookup table for the 3-dimensional image to correct the image data when the 3-dimensional image is displayed and the non-inversion compensation image is displayed.

16. The device as claimed in claim 15 , wherein:

when the 3-dimensional image is applied at 120 Hz, the left eye image and the right eye image are alternately applied, and

when the 3-dimensional image is applied at 240 Hz, the left eye image, the left eye image, the right eye image, and the right eye image are alternately applied, or the left eye image, a black image, the right eye image, and the black image are alternately applied.

17. The device as claimed in claim 12 , wherein the signal controller includes a DCC unit to correct the image data output from the ACC unit in order to improve a response speed of the display panel.

18. The device as claimed in claim 12 , wherein:

the reference gamma data generator includes the lookup table for the 2-dimensional image and the lookup table for the 3-dimensional image, and

the reference gamma data generator generates reference gamma data using the lookup table for the 2-dimensional image when the 2-dimensional image is displayed, and generates reference gamma data using only the lookup table for the 3-dimensional image when the 3-dimensional image is displayed.

19. The 3-dimensional image display device as claimed in claim 1 , wherein:

the reference gamma data generated by the reference gamma data generator is transmitted to the gray voltage generator, and

the reference gamma data transferred between the reference gamma data generator and the gray voltage generator is a digital signal.

20. A controller for a 3-dimensional image display device, comprising:

a reference gamma data generator to correct image data;

a gray voltage generator to generate a gray voltage based on the corrected image output from the reference gamma data generator; and

a signal controller to control a display panel to display left-eye and right-eye images based on the gray voltage output from the gray voltage generator, and to control glasses including a left-eye lens and a right-eye lens based on a glasses synchronization signal, wherein

the signal controller compensates for a difference of charging rates of the left-eye and right-eye images based on the glasses synchronization signal by applying different lookup tables on the left eye image and the right eye image, respectively, the difference of the charging rates of the left eye image and the right eye image being caused by a polarity inversion driving of the pixels, wherein:

a polarity of the data voltage applied to the display panel is inversed for predetermined frames,

one image between the left eye image and the right eye image, applied with the polarity inversion, is an inversion compensation image, and

another image between the left eye image and the right eye image, applied without the polarity inversion, is a non-inversion compensation image, and wherein

the inversion compensation image and the non-inversion compensation image are compensated by applying the different lookup tables, respectively.