| 摘要 |
PROBLEM TO BE SOLVED: To realize a high-quality display device by lowering emission ratios of other colors while noticing a color whose luminance is required to be raised most in order to achieve emission ratios to avoid the lack of the number of gradations in adjusting a white balance. SOLUTION: Coating film thicknesses of phosphors 104, 105 of R, G of a plasma display panel are made to be thinner as compared with the coating film thickness of the phosphor 106 of B of the panel. An emission luminance becomes smaller by making the film thickness of a phosphor to be coated thinner and, conversely, an emission luminance becomes larger by making the film thickness of a phosphor to be coated thicker. Consequently, emission efficiency of R, G are lowered by making film thicknesses of phosphors 104, 105 of R, G thinner as compared with the film thickness of the phosphor 106 of B to realize a desired white balance. The restriction of signal amplitudes for performing the white balance is made to be smaller by making white balance characteristics in the single body of a panel roughly even in this manner. Thus, the using of the number of gradations capable of being expressed by subfields is maximized and a picture degradation due to the lack of the number of gradations can be reduced. |
