公开(公告)号：US06359736B1

公开(公告)日：2002-03-19

申请号：US09622581

申请日：2000-08-21

申请人： Osamu Yoshimura

发明人： Osamu Yoshimura

IPC分类号： G02B2710

CPC分类号： G03B21/625

摘要： A lenticular lens sheet has arcuate-shaped warping such that the optical output lens side is the concave side, where, considering a chord B1 that connects points P2 and P3 to each other which are points on this approximate curve of arcurate shape and are of distance 150 mm from center line CL, and between which a distance is 300 mm, a distance to this chord B1 from the point P1 where this approximate curve and this center line intersect is represented by S0, and, considering a chord B2 that connects an upper edge UE of this approximate curve to a point P4 300 mm from the upper edge in the downwards direction, a distance to this chord B2 from the point P6 where the perpendicular from the central point P5 of this chord B2 intersects this approximate curve is represented by S1, and, considering a chord B3 that connects a lower edge LE of this approximate curve to a point P7 300 mm from the lower edge in the upwards direction, a distance to this chord B3 from the point P9 where the perpendicular from the central point P8 of this chord B3 intersects this approximate curve is represented by S2, respectively, there exists a relationship satisfying S0>S1>0 and S0>S2>0.

摘要翻译： 双凸透镜片具有弓形翘曲，使得光输出透镜侧为凹面，其中考虑将点P2和P3彼此连接的弦B1，该弦B1是这种粗略形状的近似曲线上的点，并且具有距离 距离中心线CL 150mm，距离为300mm，从该近似曲线和该中心线相交的点P1到该弦B1的距离由S0表示，并且考虑到连接上部 该近似曲线的边缘UE与从向下方向的上边缘相距P3300mm的点到与该弦C2的中心点P5的垂直方向相交的点P6到该近似曲线的距离的距离由 S1，并且考虑将该近似曲线的下边缘LE与从上方向的下边缘300mm的点P7连接的弦B3，从点P9到该弦B3的距离， 这个和弦B3的中心点P8相交的这个近似曲线分别由S2表示，存在满足S0> S1> 0和S0> S2> 0的关系。

公开(公告)号：US5749035A

公开(公告)日：1998-05-05

申请号：US728783

申请日：1996-10-10

申请人： Keiji Ban ,  Tetsuro Tomoe ,  Masami Fuchi ,  Hiroaki Tsuchiya ,  Osamu Yoshimura ,  Shinichi Tanaka

发明人： Keiji Ban ,  Tetsuro Tomoe ,  Masami Fuchi ,  Hiroaki Tsuchiya ,  Osamu Yoshimura ,  Shinichi Tanaka

IPC分类号： B65H5/36 ,  G03G15/00 ,  G03G15/16

CPC分类号： G03G15/657 ,  G03G2215/00413

摘要： A conveying guide for conveying a sheet onto which an image has been transferred is made of a synthetic resin having a resistance higher than the resistance of the transfer sheet. The upstream side end of the upper surface of the conveying guide is located sufficiently lower than the position at which the sheet is separated from the surface of the photoreceptor drum. With these arrangements, the charging of the conveying guide due to the friction between the sheet and the guide is prevented, thereby restraining the image quality deterioration.

摘要翻译： 用于输送图像已经转印到其上的片材的输送引导件由具有高于转印片的电阻的电阻的合成树脂制成。 输送引导件的上表面的上游侧端部位于足够低于片材从感光鼓表面分离的位置。 利用这些布置，防止了由于片材和引导件之间的摩擦而导致的输送引导件的充电，从而抑制了图像质量的恶化。

公开(公告)号：US5432636A

公开(公告)日：1995-07-11

申请号：US251367

申请日：1994-05-31

申请人： Masaki Ishii ,  Yoshihiro Kumagai ,  Osamu Yoshimura ,  Ichiro Matsuzaki ,  Shinichi Asano ,  Takao Kibushi

发明人： Masaki Ishii ,  Yoshihiro Kumagai ,  Osamu Yoshimura ,  Ichiro Matsuzaki ,  Shinichi Asano ,  Takao Kibushi

IPC分类号： G03B21/62 ,  G03B21/60

CPC分类号： G03B21/625

摘要： In a rear-projection screen comprising a Fresnel lens and a light-diffusing member such as a lenticular lens sheet, a rise angle in a central region of the Fresnel lens is smaller than a rise angle in an intermediate region thereof (e.g., the former is not larger than 3.degree. and the latter is larger than 3.degree. ). The rise angles may preferably gradually increase from the central region of the Fresnel lens toward the intermediate region thereof. The central region of the Fresnel lens may preferably be a region extending within the range of from 1/4 to 1/3 from the middle point of a diagonal of the rear-projection screen. Such a Fresnel lens is effective for improving white uniformity in the intermediate region of the rear-projection screen and eliminating color corn in the central region thereof.

摘要翻译： 在包括菲涅尔透镜和诸如双凸透镜片的光漫射构件的背投屏幕中，菲涅尔透镜的中心区域的上升角小于其中间区域中的上升角（例如，前者 不大于3°，后者大于3°）。 上升角度可以优选地从菲涅尔透镜的中心区域逐渐增加到其中间区域。 菲涅尔透镜的中心区域优选地是从背投屏幕的对角线的中点延伸在从1/4到1/3的范围内的区域。 这样的菲涅尔透镜对于提高背投屏幕的中间区域的白色均匀性和消除其中心区域的彩色玉米是有效的。