| 摘要 |
PURPOSE:To invariably obtain stable index signals by using a YAP phosphor coated with a pigment absorbing the color with a wavelength longer than that of a green color as the first index phosphor and a P46 phosphor as the second index phosphor. CONSTITUTION:A YAP phosphor coated with a pigment 15 (e.g., cobalt aluminate, etc.) attenuating the light with a wavelength range of 450nm-650nm but not attenuating the light with a wavelength of 450nm or less and allowing it to permeate nearly intact is coated as the first index phosphor between blue phosphor stripes and red phosphor stripes; a P46 phosphor is mixed with a green phosphor as the second index phosphor and the mixture is coated as green phosphor/second index phosphor stripes. Accordingly, light index signals from the YAP phosphor and P46 phosphor can be nearly completely separated and received by using an optical filter, and the color regeneration can be performed stably and with a correct hue. |
