초록 ▼

The present invention provides an EL display adapted to receive a three-color input image signal, including three gamut-defining EL emitters for emitting red, green, and blue colored light and two additional EL emitters for emitting at least two additional colors of light, the chromaticity coordinat

The present invention provides an EL display adapted to receive a three-color input image signal, including three gamut-defining EL emitters for emitting red, green, and blue colored light and two additional EL emitters for emitting at least two additional colors of light, the chromaticity coordinates of the at least two additional colors of light lying inside the gamut and near the Plankian Locus; a structure for providing a display white point; and a controller responsive, to the provided display white point and the input image signal for providing first separate drive signals for the three gamut-defining EL emitters and second separate drive signals for the two additional EL emitters, wherein the respective luminance values corresponding to the second separate drive signals are each a function of the input image signal and the distances between the display white point and the pseudo-blackbody points of the two additional colors.

대표청구항 ▼

1. An EL display adapted to receive a three-color input image signal, comprising: a) three gamut-defining EL emitters for emitting red, green, and blue colored light and a first and a second additional EL emitter for emitting two different additional colors of light having chromaticity coordinates s

1. An EL display adapted to receive a three-color input image signal, comprising: a) three gamut-defining EL emitters for emitting red, green, and blue colored light and a first and a second additional EL emitter for emitting two different additional colors of light having chromaticity coordinates specifying respective pseudo-blackbody points, the chromaticity coordinates of the two additional colors of light lying inside a gamut defined by the three gamut-defining emitters and near the Plankian Locus, wherein the two pseudo-blackbody points have respective correlated color temperatures that differ by at least 2000K, and wherein each EL emitter outputs light at a corresponding luminance value in response to a corresponding drive signal;b) means for providing a display white point; andc) a controller responsive to the provided display white point and the three-color input image signal for providing first separate drive signals for the three gamut-defining EL emitters and second separate drive signals for the two additional EL emitters, wherein the respective luminance values corresponding to the second separate drive signals are each a function of the input image signal and the distances between the display white point and the pseudo-blackbody points of the two additional colors. 2. The EL device of claim 1, wherein when the input image signal corresponds to the provided display white point, the additional emitter having a pseudo-blackbody point closest to the chromaticity coordinates of the provided display white point has a higher luminance value than the additional emitter having the pseudo-blackbody point furthest from the chromaticity coordinates of the provided display white point. 3. The EL device of claim 1, wherein one of the pseudo-blackbody points of the two additional EL emitters has a correlated color temperature of 6500K or less and the second has a correlated color temperature of 8000K or greater. 4. The EL device of claim 1, wherein each EL emitter has a respective radiant efficiency and the radiant efficiencies of the two additional emitters are both higher than all of the respective radiant efficiencies of the gamut-defining EL emitters. 5. The EL device of claim 1, further including corresponding color filters for each of the three gamut defining emitters and one of the two additional emitters. 6. The EL device of claim 1, further including a non-emitting layer having a variable thickness, wherein the non-emitting layer has a different thickness in the first additional EL emitter than the second additional EL emitter. 7. The EL device of claim 6, wherein the non-emitting layer is a transparent inorganic conductor or an organic semiconductor. 8. The EL device of claim 6, wherein the non-emitting layer has a different thickness in a first selected gamut-defining EL emitter than in a second selected gamut-defining EL emitter. 9. The EL device of claim 8, wherein the first additional EL emitter has a higher correlated color temperature than the second additional EL emitter, and wherein the thickness of the non-emitting layer within the gamut-defining EL emitter for emitting blue colored light is equal to the thickness of the non-emitting layer within the selected first additional EL emitter. 10. The EL device of claim 8, wherein the first additional EL emitter has a higher correlated color temperature than the second additional EL emitter, and wherein the thickness of the non-emitting layer within the gamut-defining EL emitter for emitting red or green colored light is equal to the thickness of the non-emitting layer within the second additional EL emitter. 11. The EL device of claim 1, wherein the display white point has a corresponding luminance value and the controller adjusts the luminance value of the display white point in response to the input image signal. 12. The EL device of claim 6, wherein the controller adjusts the luminance value of the display white point in response to a saturation of the input image signal. 13. An EL display, adapted to receive a three-color input image signal comprising: a) three gamut-defining EL emitters for emitting red, green, and blue colored light, wherein the three gamut-defining EL emitters define a gamut and wherein each EL emitter outputs light at a corresponding luminance value in response to a corresponding drive signal;b) cyan, magenta and yellow additional EL emitters for respectively emitting cyan, magenta and yellow light, wherein each additional EL emitter is within the gamut and has respective chromaticity coordinates, the line between the chromaticity coordinates of the cyan EL emitter and the magenta EL emitter intersects the Planckian Locus to define a first pseudo-blackbody point, the line between the chromaticity coordinates of the yellow EL emitter and the magenta EL emitter intersects the Planckian Locus to define a second pseudo-blackbody point, the distance between the first and second pseudo-blackbody points along the Planckian Locus is greater than 2000K, and wherein each EL emitter outputs light at a corresponding luminance value in response to a corresponding drive signalc) means for providing a display white point; andd) a controller responsive to the provided display white point and the input image signal for providing first separate drive signals for the three gamut-defining EL emitters and second separate drive signals for the three additional EL emitters, wherein the respective luminance values corresponding to the second separate drive signals are each a function of the input image signal and the distances between the chromaticity coordinates of the display white point and the first and second pseudo-blackbody points. 14. The EL device of claim 13, wherein when the input image signal corresponds to the provided display white point, the sum of the luminance values of the additional emitters defining a pseudo-blackbody point closest to the chromaticity coordinates of the provided display white point is higher than the sum of the luminance values of the additional emitters defining a pseudo-blackbody point furthest from the provided display white point. 15. The EL device of claim 13, wherein the second pseudo-blackbody point has a correlated color temperature of 6500K or less and the first pseudo-blackbody point has a correlated color temperature of 8000K or greater. 16. The EL device of claim 13, wherein each EL emitter has a respective radiant efficiency and the radiant efficiencies of the three additional emitters are all higher than all of the respective radiant efficiencies of the gamut-defining EL emitters. 17. The EL device of claim 13, further including corresponding color filters for each of the three gamut-defining EL emitters and exactly two of the three additional EL emitters. 18. The EL device of claim 13, wherein the display white point has a corresponding luminance value and the controller adjusts the luminance value of the display white point in response to the input image signal. 19. The EL device of claim 18, wherein the controller adjusts the luminance value of the display white point in response to a saturation of the input image signal.