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    • 5. 发明授权
    • Paper type determination device
    • 纸张类型确定装置
    • US08018603B2
    • 2011-09-13
    • US12966140
    • 2010-12-13
    • Yoshinori Honguh
    • Yoshinori Honguh
    • G01B11/30
    • G03G15/5029G03G2215/00616G03G2215/00751
    • A paper type determination device of the invention drives plural light emitting points different from one another and having sequentially increasing distances from a reference point to emit light in such a manner that each is identified for irradiating one surface of a sheet of paper subjected to determination. A photodetection device set at a specific detection field of view having the center at the reference point is disposed on the other surface side of the sheet of paper, and it receives light having passed through the sheet of paper from the respective light emitting points at positions on inside and outside of the detection field of view to detect intensity of light for each light emitting point. A diffusing characteristic of the sheet of paper is obtained on the basis of the intensity of light from each light emitting point detected by the photodetection device, and a paper type is determined on the basis of the diffusing characteristic.
    • 本发明的纸张类型确定装置驱动彼此不同的多个发光点,并且具有从参考点开始依次增加的距离以发光,以便每个被识别用于照射经受确定的一张纸的一个表面。 设置在具有基准点的中心的特定检测视场的光检测装置设置在纸张的另一表面侧,并且从各个发光点在位置处接收经过该纸张的光 在检测视野内部和外部,以检测每个发光点的光强度。 基于由光检测装置检测的每个发光点的光的强度,获得纸张的漫射特性,并且基于漫射特性确定纸张类型。
    • 7. 发明授权
    • Illumination apparatus and a projection type image display apparatus using it
    • 照明装置和使用它的投影型图像显示装置
    • US06264332B1
    • 2001-07-24
    • US09272361
    • 1999-03-19
    • Yoshinori HonguhYuzuru TakashimaHisayuki MiharaMasaru Kitamura
    • Yoshinori HonguhYuzuru TakashimaHisayuki MiharaMasaru Kitamura
    • G03B2114
    • H04N5/7441G02B19/0023G02B19/0047G03B21/208
    • A projection type image display apparatus for projecting an image onto a screen includes a light source, a beam shape converter, a beam divider, a beam superimposer, a processing unit, and a projection lens. In operation, the light source emits a light beam. The beam shape converter converts a sectional shape of the light beam into a different shape. For example, the beam shape converter can convert a circular cross section into a rectangular cross section. The beam divider then spatially divides the converted light beam into plural light beams. The beam divider can include, for example, a first prism array that divides the converted light beam horizontally and vertically into four beams. The beam superimposer superimposes the plural light beams onto a target surface, such as a liquid crystal panel. The beam superimposer can include, for example, a second prism array and a beam collimator that superimpose the plural light beams on the target surface. The processing unit supplies a signal so as to display an image on the target surface. The projection lens projects the image onto the screen by the superimposed beam. This apparatus can improve the uniformity of illuminance distribution and the light utilization efficiency, while maintaining high directivity of light.
    • 用于将图像投影到屏幕上的投影型图像显示装置包括光源,光束形状转换器,光束分割器,光束叠加器,处理单元和投影透镜。 在操作中,光源发射光束。 光束形状转换器将光束的截面形状转换成不同的形状。 例如,光束形状转换器可将圆形横截面转换为矩形横截面。 分束器然后在空间上将转换的光束划分成多个光束。 分束器可以包括例如将经转换的光束水平和垂直地分为四个光束的第一棱镜阵列。 光束叠加体将多个光束叠加在诸如液晶面板的目标表面上。 光束叠加器可以包括例如将多个光束叠加在目标表面上的第二棱镜阵列和光束准直器。 处理单元提供信号以便在目标表面上显示图像。 投影透镜通过叠加的光束将图像投影到屏幕上。 该装置可以提高照度分布的均匀性和光利用效率,同时保持光的高方向性。