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    • 33. 发明授权
    • Projection type display apparatus
    • 投影式显示装置
    • US07303289B2
    • 2007-12-04
    • US11067078
    • 2005-02-25
    • Akihiro Fujiwara
    • Akihiro Fujiwara
    • G03B21/00G03B3/00
    • G02B26/101G03B21/26G03B21/53
    • A projection type display apparatus includes a projection portion for projecting an image onto a surface to be projected, a light receiving portion disposed apart from the projection portion by a base line length and used for detecting a reference image projected onto the surface to be projected, and a scanning portion for scanning the reference image on the surface to be projected in a direction of the base line length, in which the projection portion is focused based on information about a scanning position of the reference image upon predetermined detection with the light receiving portion. With the projection type display apparatus, a system can be configured with a simple processing circuit, and cost reduction can be realized.
    • 投影型显示装置包括用于将图像投影到要投影的表面上的突出部分,由基线长度与突出部分分开设置的光接收部分,用于检测投射到要投影的表面上的参考图像; 以及扫描部分,用于在预定检测时基于与基准图像的扫描位置有关的信息,在投影部分被聚焦的基线长度方向上扫描要投影的表面上的参考图像, 。 利用投影型显示装置,可以将系统配置成具有简单的处理电路,并且可以实现成本降低。
    • 39. 发明授权
    • Exposure control device
    • 曝光控制装置
    • US5272538A
    • 1993-12-21
    • US582798
    • 1990-09-13
    • Hideo HommaAkihiro FujiwaraHirofumi SudaKunihiko YamadaMasamichi ToyamaKunio Imai
    • Hideo HommaAkihiro FujiwaraHirofumi SudaKunihiko YamadaMasamichi ToyamaKunio Imai
    • H04N5/235H04N5/238
    • H04N5/238H04N5/2351
    • An exposure control device for performing exposure control on the basis of a video signal obtained from a light measuring area set within an image sensing plane is provided with a determining circuit which determines the position of a photographed object within the image sensing plane from the values of a specific component of the video signal obtained from the inside and outside of a detection area the position of which is variably set within the image sensing plane. The light measuring area is set in the object's position within the image sensing plane detected by the determining circuit. The exposure control device is provided further with a changing circuit which detects the size of the object on the image sensing plane and changes the size of the light measuring area accordingly, and a weighting circuit which performs for light measurement a weighting operation on video signals obtained from the inside and outside of the light measuring area.
    • 用于根据从摄像平面内设置的光测量区域获得的视频信号进行曝光控制的曝光控制装置设置有确定电路,该确定电路从摄像平面内的拍摄对象的位置确定 从其位置可变地设置在图像感测平面内的检测区域的内部和外部获得的视频信号的特定分量。 光测量区域被设置在由确定电路检测到的图像感测平面内的物体的位置。 该曝光控制装置还具有检测图像检测面上的物体的尺寸并相应地改变光测量区域的尺寸的改变电路,以及用于对所获得的视频信号进行光测量加权操作的加权电路 从光测量区域的内部和外部。