专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US5161022A dc-dc Converter for video apparatus 失效
标题翻译：用于视频设备的DC-DC转换器
公开(公告)号：US5161022A
公开(公告)日：1992-11-03
申请号：US698210
申请日：1991-05-10
申请人： Hiroshi Ichimura , Ikumi Minema , Wataru Katase
发明人： Hiroshi Ichimura , Ikumi Minema , Wataru Katase
IPC分类号： H04N5/225 , H02M3/335 , H04N5/63
CPC分类号： H02M3/33507
摘要： A dc-dc converter for converting first to second dc voltages, used for video apparatus, comprising: a self-excited oscillation circuit for producing a clock signal, the self-excited oscillation circuit having a control input for controlling oscillation thereof in response to a control signal; a pulse width modulation circuit responsive to the clock signal and the second dc voltage for controlling duty ratio of the clock signal; a switching circuit responsive the pulse-width-modulated clock signal for switching the first dc voltage; rectifying and smoothing circuit for rectifying and then smoothing an output of the switching circuit to produce the second dc voltage; and a control circuit responsive to a vertical synchronizing signal of a video signal used in the video apparatus for producing the control signal whose pulse width is sufficiently shorter than a vertical retrace period of the vertical synchronizing signal. Oscillation of the self-excited circuit is controlled in response to the vertical synchronizing signal to prevent switching noise of the dc-dc converter from disturbing the reproduced image.

2. 发明授权

US4916528A Color stripe filter in color image pickup apparatus 失效
标题翻译：彩色图像拾取装置中的彩条条滤波器
公开(公告)号：US4916528A
公开(公告)日：1990-04-10
申请号：US291202
申请日：1988-12-28
申请人： Itsuo Takanashi , Shintaro Nakagaki , Hiroshi Ichimura , Ichiro Negishi , Masaru Osada , Wataru Katase , Kaoru Kitami
发明人： Itsuo Takanashi , Shintaro Nakagaki , Hiroshi Ichimura , Ichiro Negishi , Masaru Osada , Wataru Katase , Kaoru Kitami
IPC分类号： H04N9/04
CPC分类号： H04N9/04
摘要： A color separation stripe filter in a color image pickup apparatus in which a color image is focused on a photo-electric conversion target through the filter to be converted to an electrostatic image so as to generate a color multiplexed signal. The filter comprises a plurality of recurrent groups of three different color stripes successively arranged at periodic intervals. The first color stripe has a characteristic showing a peak transmission factor in a red color region, the second color stripe has a characteristic showing a peak transmission factor in a green color region which is substantially equal to the peak transmission factor of the first color stripe, and the third color stripe has a characteristic showing a negative peak transmission factor at a wavelength between 500 nm and 530 nm so as to produce first and second peak transmission factors in a blue region and said green region. The first peak transmission factor is substantially equal to each of the peak transmission factors of the first and second color stripes and the second peak transmission factor existing in the green color region to be 50% to 80% of each of the peak transmission factors of the first and second color stripes, a curve of the characteristic of the third color stripe in the green region being substantially similar in configuration to that of the second color stripe.

3. 发明授权

US4897730A Image pickup device with index signal generator 失效
标题翻译：带索引信号发生器的摄像装置
公开(公告)号：US4897730A
公开(公告)日：1990-01-30
申请号：US239292
申请日：1988-09-01
申请人： Makotoi Iwahara , Itsuo Takanashi , Shintaro Nakagaki , Horosi Ichimura , Ichiro Negishi , Masaru Osada , Wataru Katase
发明人： Makotoi Iwahara , Itsuo Takanashi , Shintaro Nakagaki , Horosi Ichimura , Ichiro Negishi , Masaru Osada , Wataru Katase
IPC分类号： H04N9/07 , H04N5/228 , H04N9/077
CPC分类号： H04N9/077 , H04N5/228
摘要： An image pickup device comprises an image pickup tube and an index generator having a light shield box; a light emitting diode held in the light shield box; a stripe screen provided on the photosensitive layer of the image pickup tube and shading compensation filter having transmittance pattern which equalizes illuminance variation on the stripe pattern of the stripe screen caused by the light emitting diode so that illuminance at any point of the stripe pattern becomes uniform. The image pickup tube generates picture signal together with index signal which is derived from the projected stripe pattern image on peripheral portion of the photosensitive layer through the shading compensation filter which equalizes index signal output level to make timing derived from the index signal accurate. A method of providing shading compensation filter is disclosed where a sheet of negative film is placed on the opening of the light shield box, exposed to the light emitting diode. Then the sheet of film is developed by chemical process.
摘要翻译：图像拾取装置包括图像拾取管和具有遮光盒的指示发生器; 保护在灯罩中的发光二极管; 设置在图像拾取管的感光层上的条纹屏幕和具有使由发光二极管引起的条纹屏幕条纹图案上的照度变化相等的透射图案的阴影补偿滤光器，使得条纹图案的任何点处的照度变得均匀。图像拾取管与通过使索引信号输出电平相等的来自感光层的周边部分上的投影条纹图案的暗影补偿滤波器产生图像信号，使得从索引信号得到的定时准确。公开了一种提供阴影补偿滤光器的方法，其中一片负片放置在遮光盒的开口上，暴露于发光二极管。然后通过化学工艺开发薄膜片。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式