Patent ID: 7891817
Filing Date: 2011-02-22
Classification: G03B

Abstract:
1. A projection display apparatus that projects an image on a screen, comprising: at least three light sources that emit light beams of different wavelengths; at least three optical units that convert the light beams emitted from the at least three light sources into substantially collimated light beams; a prism that combines the substantially collimated light beams from the at least three optical units into a single beam of light, each of the substantially collimated light beams received by the prism at a respective different angle with respect to an entry face of the prism and the single beam of light emitting from an exit face of the prism at an angle perpendicular to the exit face of the prism; means for scanning the single beam of light emitted from the prism so as to allow the single beam of light to enter the screen; and a fixed light-guiding mirror that guides the single beam of light emitted from the means for scanning to the screen, a height of the light-guiding mirror being more than half of a height of the screen.