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    • 84. 发明授权
    • Projector for compensating chromatic aberration of magnification
    • 用于补偿倍率色差的投影仪
    • US07156521B2
    • 2007-01-02
    • US10500571
    • 2003-10-29
    • Fumie KawaiKazuhiro NishidaShuji Narimatsu
    • Fumie KawaiKazuhiro NishidaShuji Narimatsu
    • G03B21/14G03B21/00G03B21/20
    • H04N9/3105G02B27/0025G02B27/1046G02B27/149G02B27/288G03B21/005
    • A projector having a cross-dichroic prism (260) synthesizing three kinds of red, green, and blue light emitted from liquid crystal panels (250, 252, 254); and a projection lens (270) projecting the synthesized light and also having polarizing plates (251, 253, 255) disposed on the optical paths between the corresponding liquid crystal panels (250, 252, 254) and the cross-dichroic prism (260) includes a lens element (256), serving as an optical element for compensating chromatic aberration of magnification, which is formed on and integrally with one surface of the polarizing plate (251) disposed on the light path of the red light and which adjusts the size of the projected image screen of the red light extending along at least a predetermined direction so as to be nearly equal to those of the projected image screens of the other kinds of color light extending along the predetermined direction.
    • 一种具有合成从液晶面板(250,252,254)发射的三种红色,绿色和蓝色光的交叉二向色棱镜(260)的投影仪; 投影合成光的投影透镜(270),还具有设置在相应的液晶面板(250,252,254)和交叉二向色棱镜(260)之间的光路上的偏振片(251,253,255) 包括用作补偿倍率倍数的光学元件的透镜元件(256),所述透镜元件形成在设置在红光的光路上的偏振片(251)的一个表面上并与其一体地形成,并且调整尺寸 所述投影图像屏幕沿着至少预定方向延伸的所述红色光的投影图像屏幕几乎等于沿着所述预定方向延伸的所述另一种颜色光的投影图像屏幕。
    • 90. 发明授权
    • Projector
    • 投影机
    • US06886945B2
    • 2005-05-03
    • US10795330
    • 2004-03-09
    • Kazuhiro NishidaKatsuyuki Uehara
    • Kazuhiro NishidaKatsuyuki Uehara
    • G02F1/13G02B3/00G02B5/00G02F1/13357G03B21/00G03B21/14
    • G02B27/0961G02B3/0056G02B5/005G02B27/0927G03B21/005
    • A projector is provided to ensure the enhancement of contrasts while reducing the needs for alignment accuracy. The projector includes a light source, a first lens array, a second lens array, a superimposing lens, and a projection lens. The first lens array splits light emitted by the light source into a plurality of partial light beams with a plurality of small lenses that are arranged in a matrix. The second lens array includes a plurality of small lenses corresponding to the plurality of small lenses of the first lens array. The superimposing lens superimposes a plurality of partial light beams emitted by the first lens array and the second lens array on a liquid crystal panel. The projection lens projects light modulated by the liquid crystal panel. In the projector, a diaphragm having an opening that is shaped to be nearly similar to the outline of the second lens array is provided in the vicinity of an area conjugated with the second lens array.
    • 提供投影仪以确保增强对比度,同时减少对准精度的需要。 投影仪包括光源,第一透镜阵列,第二透镜阵列,叠加透镜和投影透镜。 第一透镜阵列将由光源发射的光分成多个部分光束,其中多个小透镜被布置成矩阵。 第二透镜阵列包括与第一透镜阵列的多个小透镜相对应的多个小透镜。 叠加透镜将由第一透镜阵列和第二透镜阵列发射的多个部分光束叠加在液晶面板上。 投影透镜投射由液晶面板调制的光。 在投影仪中,在与第二透镜阵列共轭的区域的附近设置有具有与第二透镜阵列的轮廓几乎相似的形状的开口的隔膜。