Image display device and image display method

1. An image display device that forms an image, with a display output that is a combination of quantities of backlight of at least three colors and sub-pixel transmittances of at least three colors, the image display device comprising:

a memory means in which the light-emission wavelength distribution characteristics of the quantities of backlight and the transmission wavelength distribution characteristics of the sub-pixel transmittances are stored;

a correction coefficient calculation circuit for calculating crosstalk coefficients required for crosstalk compensation of the light-emission wavelength distribution characteristics of the quantities of the backlight with the transmission wavelength distribution characteristics of the sub-pixel transmittance, thereby compensating for non-conformity between the light-emission wavelength distribution characteristics of the quantities of the backlight in one pixel and the transmittance wavelength distribution characteristics of the sub-pixel transmittances in the one pixel; and

a drive means for driving the quantities of backlight independently among the at least three colors;

wherein the light-emission wavelength distribution characteristics of the quantities of backlight and transmission wavelength distribution characteristics of the sub-pixel transmittances are read out from the memory means, and

the sub-pixel transmittance of the at least three colors based on the quantities of the backlight of the at least three colors are obtained independently in each one pixel.

2. An image display device that forms an image, with a display output that is a combination of quantities of backlight of at least three colors and sub-pixel transmittances of at least three colors, the image display device comprising:

a drive means for driving the quantities of backlight independently among the at least three colors; and

a memory means for storing crosstalk coefficients required for crosstalk compensation of the light-emission wavelength distribution characteristics of the quantities of backlight with the transmission wavelength distribution characteristics of the sub-pixel transmittances, thereby compensating for non-conformity between the light-emission wavelength distribution characteristics of the quantities of the backlight in one pixel and the transmittance wavelength distribution characteristics of the sub-pixel transmittances in the one pixel;

wherein the crosstalk coefficients are read from the memory means, and the sub-pixel transmittances of the at least three colors based on the quantities of backlight of the at least three colors are obtained independently in each one pixel.

3. An image display device according to claim 1 , which further comprises:

a compensation means for compensating the crosstalk of the light-emission wavelength distribution characteristics of the quantities of backlight with the transmission wavelength distribution characteristics of the sub-pixel transmittances, wherein the compensation means corrects the sub-pixel transmittances on the basis of the quantities of backlight.

4. An image display device according to claim 1 , which further comprises:

a means for calculating correction coefficients on the basis of the quantities of backlight; and

a means for correcting the sub-pixel transmittances using the correction coefficients.

5. An image display device according to claim 1 , which further comprises:

a drive means for driving the quantities of backlight independently among the at least three colors;

a drive means for controlling the sub-pixel transmittances;

a means for calculating correction coefficients on the basis of the quantities of backlight; and

a means for correcting the sub-pixel transmittances using the correction coefficients.

6. An image display device according to claim 1 , which further comprises:

a memory means in which the light-emission wavelength distribution characteristics of the quantities of backlight and the transmission wavelength distribution characteristics of the sub-pixel transmittances are stored;

a data communication means for transmitting the light-emission wavelength distribution characteristics of the quantities of backlight, and transmission wavelength distribution characteristics of the sub-pixel transmittances, between the memory means and an external memory means.

7. An image display device according to claim 1 , wherein

the quantities of backlight and the sub-pixel transmittances are stored in an external image memory means and processed.

8. An image display device comprising:

a liquid crystal panel;

a backlight;

a light emitting diode (LED) drive circuit that independently controls the quantities of each of at least red, green, and blue (RGB) colors generated by a backlight;

a liquid crystal display (LCD) drive circuit that independently controls the transmittance of each of at least one red sub-pixel, at least one green sub-pixel, and at least one blue sub-pixel of the liquid crystal panel;

a memory that stores RGB wavelength distribution characteristics of the backlight, and RGB wavelength distribution characteristics of the transmittance of the sub-pixels of the liquid crystal panel; and

a correction coefficient calculation circuit that corrects the transmittance of at least one sub-pixel of the liquid crystal panel using the RGB wavelength distribution characteristics of the backlight stored in the memory, and the RGB wavelength distribution characteristics of the transmittance of the sub-pixels of the liquid crystal panel stored in the memory, thereby compensating for non-conformity between the RGB wavelength distribution characteristics of the quantities of the backlight of the at least one sub-pixel of the liquid crystal panel and the RGB wavelength distribution characteristics of transmittance of the sub-pixels of the liquid crystal panel; and

wherein the sub-pixel transmittances of the at least red, green, and blue (RGB) colors based on the quantities of backlight of the at least red, green, and blue (RGB) colors are obtained independently in each one pixel.

9. The image display device according to claim 8 , wherein the RGB wavelength distribution characteristics of the backlight and the RGB wavelength distribution characteristics of the transmittance of the sub-pixels of the liquid crystal panel are inconsistent with each other.

10. The image display device according to claim 8 , which further comprises a data communication means that transmits the RGB wavelength distribution characteristics of the backlight and the RGB wavelength distribution characteristics of the transmittance of the sub-pixels of the liquid crystal panel between the memory means and an external memory means.

11. The image display device according to claim 1 , wherein the crosstalk compensation is conducted by stabilizing color reproduction by suppressing the variation of the chromaticity values in the color domain wherein the backlight emits monochrome light with the color domain, wherein the backlight emits full color.

12. The image display device according to claim 2 , wherein the crosstalk compensation is conducted by stabilizing color reproduction by suppressing the variation of the chromaticity values in the color domain wherein the backlight emits monochrome light with the color domain, wherein the backlight emits full color.

13. The image display device according to claim 8 , wherein the crosstalk compensation is conducted by stabilizing color reproduction by suppressing the variation of the chromaticity values in the color domain wherein the backlight emits monochrome light with the color domain, wherein the backlight emits full color.