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21. 发明授权

US5539425A Display unit 失效
标题翻译：显示单元
公开(公告)号：US5539425A
公开(公告)日：1996-07-23
申请号：US182540
申请日：1994-01-14
申请人： Yutaka Kamaguchi , Seiichi Nishiyama , Hisao Sakurai
发明人： Yutaka Kamaguchi , Seiichi Nishiyama , Hisao Sakurai
IPC分类号： H04N5/16 , H04N5/46 , H04N7/015 , G09G3/30
CPC分类号： H04N7/0122
摘要： A display unit in which a black level is set to a predetermined level in a first display screen having a first aspect ratio and a black level is set to a predetermined level in a second display screen having a second aspect ratio is provided. A darkest signal of a video signal is detected from an image area corresponding to the second display screen. The darkest signal is lowered to a predetermined level in an image area corresponding to the first display screen. In accordance with the principles of the present invention, the situation where a video signal of the second display screen that is to be lowered will not be lowered can be prevented.
摘要翻译：提供了在具有第二宽高比的第二显示屏中，将具有第一宽高比和黑色电平的第一显示屏中的黑电平设置为预定电平的显示单元设置为预定电平。从对应于第二显示屏的图像区域检测视频信号的最暗信号。在对应于第一显示屏的图像区域中，最黑暗的信号被降低到预定的水平。根据本发明的原理，可以防止要降低的第二显示屏的视频信号不会降低的情况。

22. 发明授权

US5293101A Driving circuit apparatus for CRT 失效
标题翻译： CRT驱动电路装置
公开(公告)号：US5293101A
公开(公告)日：1994-03-08
申请号：US916380
申请日：1992-07-21
申请人： Hisao Sakurai
发明人： Hisao Sakurai
IPC分类号： H03F3/45 , G09G1/16 , H03G7/06 , H04N5/14 , H01J29/52
CPC分类号： H03G7/06 , G09G1/16 , H04N5/148
摘要： In a driving circuit apparatus, an input video signal is logarithmically compressed via the logarithmic converting means and outputted to the exponential converting means of the next stage. The exponential converting means outputs the inputted input video signal upon inverse logarithmically converted, to the driving means which controls the image receiving tube. Since the input video signal is logarithmically compressed via the logarithmic converting means, although in case of being inputted the high frequency input video signal for high resolution, the slewing rate does not increase, and accordingly, the wideband pre-drive circuit can be more easily built in the IC.
摘要翻译：在驱动电路装置中，输入视频信号通过对数转换装置进行对数压缩，并输出到下一级的指数转换装置。指数转换装置将输入的输入视频信号进行对数转换，输出到控制图像接收管的驱动装置。由于输入视频信号是通过对数转换装置进行对数压缩的，所以在输入高分辨率的高频输入视频信号的情况下，转速不会增加，因此宽带预驱动电路可以更容易内置IC。

23. 发明授权

US5180989A Wideband amplifier 失效
标题翻译：宽带放大器
公开(公告)号：US5180989A
公开(公告)日：1993-01-19
申请号：US747697
申请日：1991-08-20
申请人： Hisao Sakurai , Seiichi Nishiyama
发明人： Hisao Sakurai , Seiichi Nishiyama
IPC分类号： H03F1/42 , H03F1/48 , H03F3/04 , H03F3/189 , H03F3/68
CPC分类号： H03F3/68 , H03F1/48
摘要： A wideband amplifier is provided having a plurality of transistors, the bases of which are commonly grounded, a signal source for generating input signals, an input terminal connected to the signal source, a drive amplifier connected to the input terminal, a plurality of input resistors connected to the drive amplifier and to respective emitters of the transistors, a plurality of load resistors connected to respective collectors of the transistors, and an output terminal connected to a junction where the collector and one of the load resistors are connected with each other.
摘要翻译：提供一种宽带放大器，其具有多个晶体管，其基极共同接地，用于产生输入信号的信号源，连接到信号源的输入端，连接到输入端的驱动放大器，多个输入电阻连接到驱动放大器和晶体管的相应发射极，连接到晶体管的相应集电极的多个负载电阻器，以及连接到集电极和一个负载电阻器彼此连接的结的输出端子。

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