| 摘要 |
PURPOSE:To make a display image easy to see on a screen which varies in screen gain by making moire fringes, generated on the screen, invisible by the projection type liquid crystal projector. CONSTITUTION:In the projection type liquid crystal projector which irradiates a liquid crystal panel 4 with the light from a light source 1 and a reflecting mirror 2 and projects the light passed through the liquid crystal panel 4 on a screen 6 where lenticular parts 7 are arranged by a projection optical system 5 to display an image formed by the liquid crystal panel 4, the liquid crystal panel 4 is vibrated at right angles to the array of the lenticular parts 7; and the amplitude of the vibration is a half as large as the pitch of the moire fringes formed on the screen 6 and the frequency of the vibration is higher than an eye recognizable speed. Consequently, the light and shade of the moire fringes are seen to be uniformed with human eyes and the moire fringes seem to disappear, so that the display image on the screen 6 becomes easy to see. |
