Image display apparatus

Details Image display apparatus Image display apparatus

G - Physics

02

B

G02B 27/18 (2006.01) G02B 26/08 (2006.01) H04N 5/74 (2006.01) H04N 7/015 (2006.01) H04N 9/31 (2006.01)

Patent

CA 2247884

An image display apparatus including an arc lamp as a white-light source, an ellipsoidal mirror for collecting a light beam from the arc lamp, a color filter for producing sequentially three primaries of light from the white-light beam, a condenser lens for allowing to be transmitted therethrough a light beam transmitted through the color filter, a single spherical mirror or non-spherical mirror for reflecting the light beam transmitted through the condenser lens, a digital micromirror device which receives the light beam reflected from the reflecting mirror and produces on and off states by varying the tilt of a micromirror of each of a number of two-dimensionally arrayed pixels to vary the angle of reflection of the light beam reflected therefrom, and a projection lens which enlarges and projects the light beam reflected from a pixel. The spherical mirror or non-spherical mirror is arranged such that the normal of the mirror at an intersection where the optical axis of an optical illumination module including the arc lamp, the ellipsoidal mirror and the condenser lens intersects the mirror is inclined by a predetermined angle.

Un dispositif d'affichage d'image comprend un arc (51) qui constitue la source de lumière blanche, un miroir elliptique (52) qui condense la lumière émise par l'arc (51), un filtre coloré (53) qui produit la lumière des trois couleurs primaires à partir de la lumière blanche avec le temps, un condenseur (1) qui transmet la lumière transmise par le filtre coloré (53), un miroir unique sphérique (2) ou non sphérique (3) qui réfléchit la lumière transmise par le condenseur (1), un micromiroir numérique (56) dans lequel entre la lumière réfléchie par le miroir et qui modifie l'angle de la lumière émise réfléchie en modifiant l'inclinaison des micromiroirs d'un certain nombre de pixels, et une lentille de projection (57) qui étale et projette la lumière réfléchie par les micromiroirs. La perpendiculaire du miroir sphérique (2) ou non sphérique (3) au point d'intersection avec l'axe optique d'un système optique d'éclairement, comprenant l'arc (51), le miroir elliptique (52) et le condenseur (1), est inclinée d'un angle prédéterminé.

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