Liquid crystal projector device



(57)【要約】 【課題】 三原色の分光方法を複数備え、装置を高輝度 表示用と高色彩再現用とに切換える。 【解決手段】 光源1からの光線をインテグレータレン ズ2、3、レンズ4で集光し、ダイクロイックミラー 7、10で三原色に分光し、三枚の液晶パネル9、11、14 を照射し、光変調された光線をダイクロイックプリズム 15で合成し、投写レンズ16でスクリーンに投写する。フ ィルタ6は三原色の各色のそれぞれの波長領域の端部を カットする特性のもので、高色彩再現用のときはこのフ ィルタを分光前の光路に挿入し、純度の高い色が液晶パ ネルを照射するようにし、高輝度画像表示用のときはフ ィルタを光路から外し、各色の全波長領域の光線が液晶 パネルを照射するようにする。または、ミラー8、13、 ダイクロイックミラー10の電気的な制御で照射光線の波 長領域を狭・広に切換えるようにする。
PROBLEM TO BE SOLVED: To obtain a device equipped with a plurality of spectroscopic methods for three primary colors so that the device can be switched between for display with high luminance and for reproduction of highquality colors. SOLUTION: Rays from a light source 1 are condensed by integrator lenses 2, 3 and a lens 4 and spectrally divided into three primary colors by dichroic mirrors 7, 10 to illuminate three liquid crystal panels 9, 11, 14, and the modulated rays are synthesized by a dichroic prism 15 and projected by a projecting lens 16 onto a screen. A filter 6 having such characteristics that it cuts the edge part of the wavelength region of each color of the three primary colors is inserted into the optical path prior to the spectral division for the high-quality reproduction of colors so that the liquid crystal panel is irradiated with light of colors with high purity. For the image display with high luminance, the filter is retrieved from the optical path so that the liquid crystal panel is irradiated with rays in the whole wavelength region of each color. Or, the wavelength region of irradiating rays can be switched between narrow and wide ranges by electrically controlling mirrors 8, 13 and the dichroic mirror 10.




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