公开(公告)号：US20020008852A1

公开(公告)日：2002-01-24

申请号：US09901357

申请日：2001-07-09

申请人： MINOLTA CO., LTD.

发明人： Satoshi Onishi ,  Kazuhiko Inoue ,  Iwao Adachi ,  Yasumasa Sawai ,  Hideki Nagata

IPC分类号： G03B021/18

CPC分类号： G03B21/16

摘要： A projector includes a duct having a connecting end for connection to an air inlet provided in a housing, and an air intake end for drawing in outside air for cooling the interior of the projector. The duct is made of a soft or flexible material and is capable of altering its shape. Thus, the duct can change the position of the air intake end in space, for example, to different positions. Further, the duct is pivotable on a pivot axis, and thus can change the opening direction of the air intake end circumferentially about the pivot axis. Therefore, selection of the position and/or opening direction of the air intake end so as to draw in the outside air suitable for cooling the interior depending on the usage forms of the projector achieves efficient cooling of the interior of the projector.

摘要翻译： 投影仪包括具有用于连接到设置在壳体中的空气入口的连接端的管道和用于吸入外部空气以冷却投影仪内部的进气端。 管道由柔软或柔软的材料制成，能够改变其形状。 因此，管道可以将空气进入端的位置改变为例如不同的位置。 此外，管道可以在枢转轴线上枢转，并且因此可以围绕枢转轴线周向地改变进气端的打开方向。 因此，根据投影机的使用形式，选择进气端的位置和/或打开方向以便吸入适合于冷却内部的外部空气，从而有效地冷却投影仪的内部。

公开(公告)号：US20020005916A1

公开(公告)日：2002-01-17

申请号：US09902346

申请日：2001-07-10

申请人： MINOLTA CO., LTD.

发明人： Yasumasa Sawai ,  Iwao Adachi ,  Satoshi Onishi ,  Kazuhiko Inoue ,  Hideki Nagata

IPC分类号： H04N005/74

CPC分类号： H04N5/7441 ,  H04N5/7458 ,  H04N9/3102 ,  H04N2005/745

摘要： A projector, which projects color images using the three liquid crystal panels (41-43) while cooling them by the fans (611-613) for G, R, and B panels, comprises the level calculation unit (711) for finding the intensity levels of the R, G, and B components of image signals, the level calculation unit (721) for finding the voice levels of voice signals, the fan control unit (73) for controlling the numbers of revolutions of the fans (611-613), and the memory (761) for storing the cumulative amount of lighting time of the lamp (21). As the intensity levels get higher, the numbers of revolutions of the fans are increased, and as the cumulative amount of lighting time becomes larger, the numbers of revolutions of the fans are decreased. As a result, unnecessary noises caused by the fans (611-613) can be reduced while the liquid crystal panels (41-43) are properly cooled. Thus, the present invention has an object of reducing the noise of the fan which cools the display devices such as liquid crystal panels in a projector. Thus, the object of the present invention is to realize a reduction in noise caused by the fan for cooling a display device such as liquid crystal panels in a projector.

摘要翻译： 用于G，R和B面板的风扇（611-613）冷却时，使用三个液晶面板（41-43）投影彩色图像的投影仪包括用于找到强度的电平计算单元（711） 图像信号的R，G和B分量的电平，用于找到语音信号的语音电平的电平计算单元（721），用于控制风扇转数的风扇控制单元（73） ）和用于存储灯（21）的点亮时间累积量的存储器（761）。 随着强度水平的提高，风扇的转速增加，随着照明时间的累积量变大，风扇的转速降低。 结果，在液晶面板（41-43）被适当冷却的情况下，可以减少由风扇（611-613）引起的不必要的噪声。 因此，本发明的目的是降低投影仪中的液晶面板等显示装置的冷却风扇的噪音。 因此，本发明的目的是实现降低由投影机中的液晶面板等显示装置冷却的风扇引起的噪声。