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    • 62. 发明申请
    • IMAGE PROJECTION DEVICE AND REAR PROJECTION TYPE DISPLAY DEVICE
    • 图像投影设备和后投影类型显示设备
    • US20100157256A1
    • 2010-06-24
    • US11993773
    • 2006-06-23
    • Tatsuo ItohKazuhisa Yamamoto
    • Tatsuo ItohKazuhisa Yamamoto
    • G03B21/28
    • G03B21/10G03B21/28H04N9/3129H04N9/3141H04N9/3161
    • An image projection device comprising an image projection means (101) for projecting an image by laser light by using a one-dimensional or two-dimensional spatial light modulation element, a first folding mirror (102) for initially folding the laser light emitted from the image projection means (101), and a second folding mirror (103) for reflecting the laser light emitted from the image projection means (101) to a screen (107) through the first folding mirror (102), wherein a distance between the second folding mirror (103) and the image projection means (101) is made larger than a distance L by which a light output power emitted from the projection lens of the image projection means (101) with a solid angle of 38.4/(L×L) is less than 1 mW. Therefore, even when a person observes the image projection device (100) from a position onto which an image is projected, the person is in an area where safety is ensured, thereby enhancing the safety.
    • 一种图像投影装置,包括通过使用一维或二维空间光调制元件通过激光投射图像的图像投影装置(101),用于最初折叠从所述第一折射反射镜 图像投影装置(101)和用于通过第一折叠反射镜(102)将从图像投影装置(101)发射的激光反射到屏幕(107)的第二折射镜(103),其中第二 使得折叠镜103和图像投影装置101的距离L大于图像投影装置(101)的投影透镜从立方角38.4 /(L×L )小于1 mW。 因此,即使当人从投影图像的位置观察图像投影装置(100)时,人在确保安全的地方,从而提高安全性。