| 摘要 |
A projection video display apparatus includes an R light source, a G light source, and a B light source. DMD uses a video signal to modulate a beam generated by each of the R, G, and B light sources. A video beam obtained is projected on to a screen via a projecting optical lens. A control circuit controls driving of R, G, and B by a drive device, in a time division manner, within a unit period which is synchronous with the vertical synchronizing frequency of the video signal, the drive device drivingly turns on and off the light sources independently of one another. In this case, the ratio of irradiation times for R, G, and B is switched within the unit period depending on color temperature.
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