Abstract:
A projection screen comprises a red-reflecting particle layer, green-reflecting particle layer and blue-reflecting particle layer sequentially stacked on a substrate. In each particle layer, particles are accumulated by eleven cycles in a regularly alignment such as close-packed structure. Diameter of red-reflecting particles is approximately 280 nm, diameter of green-reflecting particles is approximately 235 nm, and diameter of blue-reflecting particles is approximately 212 nm. Each particles layer is accumulated by self-organized technique. The substrate used here can absorb light of wavelengths other than those of red, green and blue three primary colors.
Abstract:
PROBLEM TO BE SOLVED: TO PROVIDE A SIGNAL HANDLED BY A DEVICE WITH CONFORMITY TO A PRESCRIBED SPECIFICATION FOR EXPRESSING A COLOR WITH THE COLOR GAMUT LARGER THAN A PRESCRIBED SPECIFICATION. SOLUTION: IN A PRIMARY COLOR CONVERSION UNIT (62), A FIRST COLOR AT A PRIMARY COLOR POINT WITH THE COLOR GAMUT LARGER THAN AN ORIGINAL COLOR POINT OF BT.709 IS CONVERTED TO A SECOND COLOR SIGNAL BASED ON A PRIMARY COLOR OF BT.709. IN A PHOTOELECTRIC CONVERSION UNIT (63), THE SECOND COLOR SIGNAL IS CONVERTED TO A THIRD COLOR SIGNAL ACCORDING TO CHARACTERISTICS OF PHOTOELECTRIC CONVERSION DEFINED IN A NUMERICAL RANGE LARGER THAN A NUMERICAL RANGE OF 0 TO 1.0 THAT BRIGHTNESS SIGNAL BASED ON BT. 709 AND A COLOR SIGNAL BASED ON COLOR-DIFFERENCE SIGNAL CAN TAKE. IN A COLOR SIGNAL CONVERSION UNIT (64), THE THIRD SIGNAL IS CONVERTED TO A BRIGHTNESS SIGNAL AND A COLOR DIFFERENCE SIGNAL. IN AN INTEGRATED COMPENSATION UNIT (64A), THE COLOR DIFFERENCE SIGNAL IS COMPENSATED TO A COLOR DIFFERENCE SIGNAL OF -0.57 TO 0.56 INCLUDING -0.5 TO 0.5 OF BT.709 WHICH IS EXPRESSED BY ALLOTTING IT TO AN INTEGER VALUE OF 1 TO 254 INCLUDING 16 TO 240 OF BT.709. THIS INVENTION CAN BE APPLIED TO A VIDEO CAMERA (60), FOR AN EXAMPLE.
Abstract:
A projection screen constituted by forming a fine particle layer for reflecting red color, a fine particle layer for reflecting green color, and a fine particle layer for reflecting blue color sequentially, in layer, on a substrate. In each fine particle layer, fine particles are laid regularly by 11 periods in tightest structure, for example. The fine particle for reflecting red color has diameter of about 280 nm, the fine particle for reflecting green color has diameter of about 235 nm, and the fine particle for reflecting blue color has diameter of about 212 nm. Each fine particle layer is deposited by a self-organizing technology. Such a substrate as can absorb light other than three primary colors of red, green and blue is employed.