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1. 发明专利

JPH08111850A METHOD AND DEVICE FOR SERVING VIDEO IMAGE 失效
公开(公告)号：JPH08111850A
公开(公告)日：1996-04-30
申请号：JP24607494
申请日：1994-10-12
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： OBA YUJI , NABETA SHINSUKE , NEFU TORU
IPC分类号： H04N5/93 , H04B14/04 , H04N7/15
摘要： PURPOSE: To attain viewing of a missed video image through fast forwarding reproduction by selecting real time relay reproduction through changeover when a difference between a frame number of a real time relay video image and that of a fast forwarding reproduction video image reaches a set frame difference or below. CONSTITUTION: Upon the request of fast forwarding reproduction of a video image stored in a storage device 3 controlled by a controller 4, the reproduction of the video image from a designated frame is started. Then a video frame number FS during reproduction is fetched and simultaneously a real time relay video frame number FR of a newest video image stored in the device 3 is fetched. Then a difference between the numbers FS and FR is compared with a setting allowable frame value FD, and when the both are equal, the real time relay reproduction is selected through switchover from the fast forwarding video reproduction to continue the relay of the video image. Moreover, when the image of the fast forwarding reproduction is read from the device 3, voice information going to a higher octave proportional to the reproduction speed is restored to a regular octave by a frequency converter 5. Thus, a scene of a missed relay video image is viewed and the succeeding video images are viewed without missing.

2. 发明专利

JPH05232862A 失效
公开(公告)号：JPH05232862A
公开(公告)日：1993-09-10
申请号：JP7218392
申请日：1992-02-24
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： OBA YUJI , AKUTSU AKITO , OTSUJI SEITA
IPC分类号： G09B17/04 , G06F17/30 , H04N5/91 , H04N5/93
摘要： PURPOSE:To associate contents by making a batch display in a combination of frames showing the time elapse in a moving picture so that a representative screen corresponds to the time positions of the frames. CONSTITUTION:Frames 2 corresponding to respective frames of the picture are indicated as a three-dimensional body whose time is elapsed from the front to the right upper part. When the frames 2 greatly vary in this figure, it corresponds to variation in the enlargement rate of the screen, namely, the enlargement rate increases when the frames 2 become smaller and decreases when larger. Further, elapse display lines 3 connecting the four corners of the frames 2 are provided so that the total time elapse can easily be understood. Thus, the time elapse in the moving picture is shown as the combination of the frames 2 of the frames, and the batch display of plural representative screens in the moving picture that the combination of the frames 2 includes is made corresponding to the time positions of the combination of the frames 2 together with the combination of the frames 2.

3. 发明专利

JPH05191781A VIDEO REPRODUCTION METHOD 失效
公开(公告)号：JPH05191781A
公开(公告)日：1993-07-30
申请号：JP205992
申请日：1992-01-09
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： OBA YUJI , HASEYAMA HIROSHI , TANAKA TOMOAKI
IPC分类号： H04N5/92 , H04N5/93 , H04N5/937 , H04N19/00 , H04N19/423 , H04N19/46 , H04N19/70
摘要： PURPOSE:To apply standard reproduction or fast feeding or skip reproduction to a coded video image transferred at a high speed over a real time. CONSTITUTION:A video image transferred from a device 110 is stored in a video storage section 6 of a device 100 and stored in two sets of display memories 10 simultaneously, and when any of the display memories 10 is used up, a required video image is transferred from a video storage section 6 and stored in the memory 10 while the display is not interrupted. Thus, the video image transferred at a high speed over a real time is stored and reproduced. Thus, the content of the video image in the case of display is reproduced normally by writing an optional video image to the memory 10 among video images stored at. a high speed in this way and reproduced reversely after fast feed, skip reproduction or some degree of video image is transferred thereby giving new degree of freedom having been unable by the real time transfer so far.

4. 发明专利

JPH0496581A PICTURE DISPLAY DEVICE OF VISUAL LINE COINCIDENCE TYPE 失效
公开(公告)号：JPH0496581A
公开(公告)日：1992-03-27
申请号：JP21364990
申请日：1990-08-14
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： SHIWA SHINICHI , OBA YUJI
IPC分类号： H04N5/225 , H04N5/74 , H04N7/14 , H04N7/15 , H04N7/18
摘要： PURPOSE:To prevent the neighboring part of a lens from being seen a bright spot and to eliminate ghost by using a display screen whose light transmission state and light untransmission state are alternately controlled with an electric signal and intermitting the projection of a picture projector in the case of the light transmission state. CONSTITUTION:First drive circuits 6A,6B generate a drive signal 1 synchronously with a synchronizing signal 1 to operate display screens 52A,52B. As a result, the display screen repeats the light transmission state and the light untransmission state at a period of T1. Moreover, 2nd period circuits generate a synchronizing signal 2 with a delay of a time T3 with respect to the synchronizing signal 1 to bring pickup devices 53A,53B to the input state at the light transmission state of a display screen. Furthermore, 2nd drive circuits 9A,9B generate a drive signal 2 whose delay time is T6 to bring the picture projectors 54A,54B into a non-projection state at the light transmission state of the display screen. As a result, a picture is obtained as if no display screen were in existence.

5. 发明专利

JPH03208001A PRODUCTION OF IMAGE DISPLAY DEVICE AND OPTICAL FIBER GROUP 失效
公开(公告)号：JPH03208001A
公开(公告)日：1991-09-11
申请号：JP252690
申请日：1990-01-11
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： OBA YUJI , SHIWA SHINICHI
IPC分类号： G02B6/04 , G02F1/13 , G02F1/1333 , G09F9/40
摘要： PURPOSE:To decrease the quantity of the fibers to be used and to decrease the weight of the above device by forming the magnifying optical system of images from the ratio between the area of the end part where optical fiber bundles are concentrically arranged and the area of the end part where the optical fiber bundles are linearly arranged. CONSTITUTION:The light generated by bar-shaped light sources 5, such as fluorescent lamp, is made into the light of a uniform distribution by a diffusing plate 4 and a reflecting plate 6. This light illuminates a liquid crystal display 3 and the light past the display 3 is magnified to the area larger than the surface area of the display 3 by the optical fiber bundles 2. The light is emitted from the end faces thereof, by which a screen is formed. Since the fiber bundles 2 are expanded wider than the areas of the peripheral circuit 8 of the display 3 and a display surface 7 added together, the continuous connection of the respective fiber bundles 2 to each other is possible. The one end of the fiber bundles 2 in contact with the display surface of the display 3 is closely packed or bundled in a square. The light past the panel 9 of the display 3 is thus most efficiently converged.

6. 发明专利

JPH03154093A IMAGE DISPLAY DEVICE 失效
公开(公告)号：JPH03154093A
公开(公告)日：1991-07-02
申请号：JP29234989
申请日：1989-11-13
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： OBA YUJI
IPC分类号： H04N5/74 , G09F9/00 , G09F9/35 , G09F9/40
摘要： PURPOSE:To execute illumination by small quantity of electric power by separating the light beam of a light source into two light beams having planes of polarization being orthogonal to each other, and illuminating two pieces of liquid crystal displays, respectively. CONSTITUTION:The light beam of a light source 2 is separated into a transmission light P and a reflected light S by a polarization beam splitter 3, and thereafter, they go to liquid crystal displays 5, 6. The light S illuminate the display 6, passes through a polarizing plate 12 being an analyzer, and thereafter, forms an image of one side on a screen 9 by a lens 8. On the other hand, the light P illuminates the display 5 through a relay lens 10 and a mirror 4, passes through a polarizing plate 11 being an analyzer, and thereafter, forms an image of the other side by a lens 7.

7. 发明专利

JPH0365983A IMAGE DISPLAY DEVICE 失效
公开(公告)号：JPH0365983A
公开(公告)日：1991-03-20
申请号：JP20123989
申请日：1989-08-04
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： OBA YUJI , SHIWA SHINICHI
IPC分类号： G02F1/1335 , G02F1/13357 , G09F9/00 , G09F9/40
摘要： PURPOSE:To connecting many screens seamlessly by irradiating a display surface by at least two rod type light sources which are much longer than plural liquid crystal displays. CONSTITUTION:The rod type light sources 5 which are much longer than the liquid crystal displays 3 arrayed in the lengthwise direction of the light sources are used. Light emitted by the light source 5 has a uniform light distribution through a diffusion plate 4 and a reflecting plate 6 to irradiate the liquid crystal displays 3, and light passed through them is expanded through an optical fiber bundle 2 to more than the display area of the liquid crystal displays 3, thereby forming an image plane. At this time, the respective optical fiber bundles 2 are connected continuously to one another. Thus, the rod type light sources 5 are used and the light intensity of the light sources in the screen is controlled and made uniform. Consequently, the screen can be formed with inconspicuous seams.

8. 发明专利

JPH02267536A IMAGE PROJECTING DEVICE AND SCREEN 失效
公开(公告)号：JPH02267536A
公开(公告)日：1990-11-01
申请号：JP8802889
申请日：1989-04-10
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： OBA YUJI , SHIWA SHINICHI
IPC分类号： G03B21/60 , G03B21/10 , G03B21/604 , G03B21/62
摘要： PURPOSE:To realize that a user can view a clear enlarged projected image in a light room by giving a polarizing member on a side where the illumination light source of a screen exists and giving a polarizing member whose polarization axis is perpendicular to the polarizing member of the screen to the illumination light source. CONSTITUTION:By converting a fluorescent lamp 10 with the polarizing member 11, the light of the illumination light source 4 becomes the polarized light. By making it perpendicular to the polarizing surface of the polarizing member 7 of the screen 2, the light arriving at the surface 8 of the screen is extremely little and the surface of the screen becomes black even under the bright light source 4. Then, when a projected image is projected on the screen 2 from a projector 3, the light whose component is in parallel with the polarizing surface of the member 7 arrives at the surface 8 of the screen and it is reflected because the light is circularly polarized light. As the result, the user can view the image. Since only the part of the image where the light from the projector 3 exists is light and the other part is black, the image having excellent contrast is obtained.

9. 发明专利

JPH01155319A LIQUID CRYSTAL OPTICAL SHUTTER AND ITS DRIVING METHOD 失效
公开(公告)号：JPH01155319A
公开(公告)日：1989-06-19
申请号：JP31570987
申请日：1987-12-14
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： SUGIHARA SHIGEO , MASUMORI TADAAKI , OBA YUJI
IPC分类号： G02F1/1343 , G02F1/13 , G02F1/133
摘要： PURPOSE:To obtain a liquid crystal optical shutter which can operate at a high speed and small in wiring number by using an optical shutter made of ferroelectric liquid crystal. CONSTITUTION:This is the liquid crystal optical shutter consisting of two opposite transparent electrodes and the ferroelectric liquid crystal sandwiched between the two transparent electrodes, two light shielding electrodes are provided on both sides of one transparent electrode 2 while at least one light shielding electrode is provided at the peripheral edge of the other transparent electrode 3, and a window which transmits light is formed between two electrodes provided to one transparent electrode 1. Consequently, the wiring number of a liquid crystal cells for varying light transmission area is reduced, and consequently liquid crystal cell windows can be formed with high density; and the ferroelectric liquid crystal is used, so a two-dimensional cell array is used for an area modulation type half-tone display panel.

10. 发明专利

JPH01145148A RECORDING APPARATUS AND RECORDING METHOD USING THE SAME 失效
公开(公告)号：JPH01145148A
公开(公告)日：1989-06-07
申请号：JP30141187
申请日：1987-12-01
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： OBA YUJI , MASUMORI TADAAKI
IPC分类号： B41J2/52 , H04N1/04 , H04N1/113 , H04N1/195 , H04N1/23 , H04N1/40 , H04N1/50
摘要： PURPOSE:To improve not only the positional accuracy of a pixel but also the control accuracy of the quantity of light to each pixel, by a method wherein a plurality of the windows of a two-dimensional recording head are held to a light pervious or impervious state according to an electric signal, and exposure fitted to color recording is performed using a hot or cold cathode ray tube to perform recording. CONSTITUTION:In a liquid crystal cell array, two-dimensional cells are regularly arranged and independently formed in light pervious and impervious states by a drive circuit to make it possible to keep said states for a definite time. The light of a light source 1 using this hot or cold cathode ray tube reaches a light sensor and a part thereof reaches a two-dimen sional recording head 1. The transmission of light is controlled according to image data by the two-dimensional recording head and the light is projected on a photosensitive body 15 by a lens 14 to expose the same according to image data. The quantity of the emitted light from the light source 11 is detected by the light sensor 12 and the control of the quantity of light for putting out lights at the point of time reaching the necessary quantity of light is performed. By the use of the hot or cold cathode ray tube as the light source, response is rapid and the control of the quantity of light is easy and coloration becomes possible by the use of a light emitting phosphor of the three primary colors or a color filter.

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