| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problem that the number of parts is made large and an entire projection type display device is not made small in size, light in weight and inexpensive because surface light sources emitting respective color light beams R, G and B and spatial optical modulators corresponding to the respective light sources are required in order to perform color display on the projection type display device. <P>SOLUTION: A light emitting diode emitting ultraviolet light is used for the light source, and a visible light reflection film having characteristic that the ultraviolet light is transmitted and visible light is reflected is formed on the surface of a color wheel on the light source side, and phosphor layers respectively emitting the visible light corresponding to the color light beams R, G and B by the radiation of the ultraviolet light are formed on the back surface side of the color wheel. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
