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1. 发明专利

JPH06110050A LIQUID CRYSTAL DISPLAY DEVICE 失效
公开(公告)号：JPH06110050A
公开(公告)日：1994-04-22
申请号：JP25614592
申请日：1992-09-25
申请人： HITACHI LTD
发明人： AKIYAMA TOSHIYUKI
IPC分类号： G02B3/00 , G02F1/1335
摘要： PURPOSE:To obtain a bright excellent image and to obtain a necessary projection image with high resolution without using a high-brightness light source which requires large electric power by providing a collective lens constituted by arraying small-sized lenses at respective positions, which correspond to pixel electrodes, on at least one of the surfaces of a liquid crystal panel where light is made incident and transmitted light is projected. CONSTITUTION:On one surface of the liquid crystal panel 13 being a substrate, a multi-lens 15 constituted by arraying the small-sized convex lenses 14 in two dimensions at the respective positions corresponding to the pixel electrodes 1 is provided. On the liquid crystal display device or a projection type liquid crystal display device, the multilens 15 of the liquid crystal panel is so arranged that light is made incident from the multi-lens 15. The shape of each small-sized convex lens 14 and the distance between the liquid crystal 13 as the substrate and the multi-lens 15, however, are so set that parallel light which is made incident on the surface from the side of the multi-lens 15 almost at right angles passes through the respective small-sized convex lenses 14 and are converged almost on the areas of the corresponding pixel electrodes 1.

2. 发明专利

JPH04256291A VIDEO SIGNAL PROCESSOR 失效
公开(公告)号：JPH04256291A
公开(公告)日：1992-09-10
申请号：JP1739991
申请日：1991-02-08
申请人： HITACHI LTD
发明人： AKIYAMA TOSHIYUKI
IPC分类号： H04N5/232
摘要： PURPOSE:To obtain an excellent image with small vibration on a screen by correcting only part of a variation quantity detected for an aimed image and decreasing the correction quantity. CONSTITUTION:The position correction of the output screen is performed as to only the variation quantity from which the (x)-directional maximum error and (y)-directional maximum error regarding motion detection and correction which cause line scrolling and jitters. Consequently, the position variation of a correction error is left, but its variation direction is the same as the direction of current screen variation and natural fluctuations like the line crawl and jitters which vibrate finely and vertically, field by field, are not caused. Therefore, the excellent image which is naturally seen is obtained although the variation of the screen position due to a hand shape is greatly reduced.

3. 发明专利

JPH04207494A VIDEO SIGNAL PROCESSOR 失效
公开(公告)号：JPH04207494A
公开(公告)日：1992-07-29
申请号：JP33019190
申请日：1990-11-30
申请人： HITACHI LTD
发明人： AKIYAMA TOSHIYUKI
IPC分类号： H04N9/093 , H04N9/64
摘要： PURPOSE:To reduce considerably the circuit scale and the power consumption of an interpolation arithmetic circuit by employing the interpolation arithmetic circuit which obtains a video signal value at each intersection between one curve and plural curve groups from video signal values of picture element points on plural curves through interpolation. CONSTITUTION:The above processor is provided with a cross point arithmetic circuit 20, an h-coefficient arithmetic circuit 21, an H-interpolation arithmetic circuit 22, a v-coefficient arithmetic circuit 23, and a V-interpolation arithmetic circuit 24. Moreover, the processor is provided with an interpolation arithmetic circuit 22 which obtains a video signal at each intersection between one curve including part of point series of plural noted points and plural curve groups including part of picture element point series of picture element points from video signals of picture element points on plural curves through interpolation and with an interpolation arithmetic circuit 24 which obtains a video signal with respect to each noted point from an interpolated video signal with respect to each intersection through interpolation. Thus, the circuit scale and the power consumption are reduced.

4. 发明专利

JPH03256458A IMAGE PICKUP DEVICE AND VIDEO SIGNAL PROCESSOR 失效
公开(公告)号：JPH03256458A
公开(公告)日：1991-11-15
申请号：JP5363690
申请日：1990-03-07
申请人： HITACHI LTD
发明人： AKIYAMA TOSHIYUKI
IPC分类号： G03B5/00 , H04N5/225 , H04N5/232
摘要： PURPOSE:To obtain satisfactory operability so that a photographer can be concentrated in photographing with ease by always displaying the direction of a target object, the direction of a camera lens and the allowable range of deviation between those two directions, and raising an alarm automatically when the deviation is close to the limit of the allowable range or exceeds the limit. CONSTITUTION:Since an image pickup state display device 63 in a finder always displays the direction of the target object, the direction of camera lens 1 and the allowable range for the deviation between those two directions, the photogra pher can always grasp a relation between the direction of the target object and the direction of the camera lens 1 and control the directions optimum while observing the finder. On the other hand, when the deviation between the direction of the target object and the direction of the camera lens 1 is close to the limit of the allowable range or exceeds the limit, the alarm concern ing the photographing state is raised from an alarm 61. Thus the photographer can concentrate on photographing with ease and satisfactory operability is obtained.

5. 发明专利

JPH03231590A IMAGE PICKUP DEVICE 失效
公开(公告)号：JPH03231590A
公开(公告)日：1991-10-15
申请号：JP2602690
申请日：1990-02-07
申请人： HITACHI LTD
发明人： AKIYAMA TOSHIYUKI
IPC分类号： H04N9/093
摘要： PURPOSE:To reduce color slurring and color moire remarkably due to a correction error by devising an optical filter so that the insertion direction, a zero or a minimum point of a transmission level are made different to the optical filter. CONSTITUTION:An optical low pass filter 9 made of a transparent substance having optical uniaxial double refraction characteristic is inserted to an incident optical path to an image pickup element 3 and the zero or minimum point of a transmission level of the optical low pass filter 9 to be inserted is set so as to be in existence at least between fc/2-3fc/4, or between fc/4-3fc/2, or between fc/2-3fc/4 and fc/4-fc/2, where fc is a spatial frequency of a picture element string in the vertical direction when a same color optical signal of the image pickup element 3 is detected. Thus, the resolution of a video signal is not so much lowered visually, so a level of a false signal due to a correction error, i.e., color slurring and color moire is decreased without much decreasing visually the resolution of a video signal.

6. 发明专利

JPH03231577A VIDEO SIGNAL PROCESSING UNIT 失效
公开(公告)号：JPH03231577A
公开(公告)日：1991-10-15
申请号：JP2603190
申请日：1990-02-07
申请人： HITACHI LTD
发明人： AKIYAMA TOSHIYUKI
IPC分类号： H04N5/232
摘要： PURPOSE:To reduce only a hand blur or the like by dividing a moving vector or a position vector of an image area into a component changing slowly due to panning or tilt and a blur component due to hand blur or the like and applying blur correction only to the blur component due to hand blur. CONSTITUTION:A movement of a camera head detected by a movement detector 5 is divided into a panning tilt component not corrected and a blur component to be corrected due to hand blur or the like at a component separation circuit 8 and only the blur component is fed to an accumulation circuit 9. Then an interpolation of a picture element pitch or below is obtained at an interpolation correction circuit 10 receiving an arithmetic coefficient obtained at a video signal and picture memory control circuit 6. Then the video signal whose blur is corrected and subject to interpolation is converted into a television signal by a signal conversion circuit 7 and outputted.

7. 发明专利

JPH03216085A IMAGE PICKUP DEVICE 失效
公开(公告)号：JPH03216085A
公开(公告)日：1991-09-24
申请号：JP1061090
申请日：1990-01-22
申请人： HITACHI LTD
发明人： AKIYAMA TOSHIYUKI
IPC分类号： H04N5/225 , H04N5/232 , H04N5/91 , H04N9/093
摘要： PURPOSE:To make the circuit for an image pickup section small in size and light in weight by recording a part or all of processing parameter or processing data required for substantial picture processing onto a recording medium together with a video signal. CONSTITUTION:An image pickup element 3 detects a video image, an A/D converter 5 converts it into a digital signal and it is inputted to a simple resist deviation correction circuit 6' to apply simple resist correction and the resulting correction signal is outputted to a finder 21. Moreover, a data insertion circuit 22 inserts a basic data for calculation of the resist deviation recorded in a control memory and a control circuit 8 in parallel therewith for a time not giving effect on the video image in the video signal before resist deviation correction (such as in horizontal vertical blanking period). Then the data insertion signal is recorded on a recording medium of a recorder 9 and the substantial picture processing is implemented by other signal processing unit able to reproduce the signal from the recording medium. Thus, the circuit of the image pickup section is made small in size and light in weight.

8. 发明专利

JPH02250468A IMAGE PICKUP DEVICE 失效
公开(公告)号：JPH02250468A
公开(公告)日：1990-10-08
申请号：JP7060589
申请日：1989-03-24
申请人： HITACHI LTD
发明人： AKIYAMA TOSHIYUKI , MIMURA ITARU , OZAWA NAOKI , MATSUMOTO TAKAHIRO , TAKAHASHI KENJI
IPC分类号： H04N5/232
摘要： PURPOSE:To obtain excellent video image with less fluctuation of the image by moving the position of a designated area of picture display in matching with the movement of the image in the designated area so as to decrease the movement of the image in the designated area. CONSTITUTION:Part of zoom control is implemented electrically. That is, a display video signal is outputted from a signal in an area (designated area) within a designated range on a photodetecting face of an image pickup device 1 with reconstitution. On the other hand, the movement of the image (not necessarily within the designated area) in the area of part of the video image to be picked up is detected by a movement detection circuit 7 and the position of the designated area is moved so that the relative movement of the designated area is reduced with respect to the image position. Thus, since the position on the photodetection face of the area to be displayed is moved in matching with the movement of the image of the object such is image part to be displayed, the position of the image to be displayed is nearly stopped on the screen and the video signal for excellent picture display with less video image fluctuation is obtained.

9. 发明专利

JPH02205187A IMAGE PICKUP DEVICE 失效
公开(公告)号：JPH02205187A
公开(公告)日：1990-08-15
申请号：JP2384689
申请日：1989-02-03
申请人： HITACHI LTD
发明人： AKIYAMA TOSHIYUKI , MIMURA ITARU , OZAWA NAOKI , TAKAHASHI KENJI , MATSUMOTO TAKAHIRO
IPC分类号： H04N5/335 , H04N5/378 , H04N9/09
摘要： PURPOSE:To correct a registration error caused by the chromatic aberration of a lens to three primary color signals by once demodulating the chrominance signals of three primary colors R, G and B from the output signal of an image pickup element. CONSTITUTION:Light passing through an optical lens 1 is converted to an electric signal by a solid-state image pickup element 3 and outputted as output signals Sw, Scy, Sg and Sye. These output signals are inputted to a primary color signal demodulation circuit 7 and primary color signals Sr', Sg' and Sb' are demodulated from the output signals Sw, Scy, Sg and Sye. The demodulated primary color signals Sr', Sg' and Sb' are once stored to a video signal storage circuit 4 respectively and after that registration deviation caused by the chromatic aberration of the lens is corrected by a chromatic aberration correction circuit 9. Corrected signals Sr, Sg and Sb, for which the registration deviation caused by this chromatic aberration is corrected, passes through a process encoder circuit 6 and are outputted as television signals.

10. 发明专利

JPH02105682A IMAGE PICKUP LENS 失效
公开(公告)号：JPH02105682A
公开(公告)日：1990-04-18
申请号：JP25713088
申请日：1988-10-14
申请人： HITACHI LTD
发明人： MIMURA ITARU , AKIYAMA TOSHIYUKI , MATSUMOTO TAKAHIRO , OZAWA NAOKI , TAKAHASHI KENJI
IPC分类号： H04N5/225 , H04N5/232 , H04N5/335
摘要： PURPOSE:To automatically exchange aberration correction data even when a lens is exchanged by providing a memory to store the aberration correction data in a lens main body, and performing registration correction by reading out the correction data stored in the lens main body at need. CONSTITUTION:Data to correct aberration generated at an optical part 4 is held corresponding to the characteristic and the position of the lens in an aberration correction data memory 2. A lens parameter detection circuit 3 detects the parameter of an image pickup state, and takes out the aberration correction data corresponding to the parameter from the memory 2. The correction data is transmitted to the microcomputer 15 of the camera main body via a transmission path 21. The microcomputer 15 computes the registration correction signals of a red color image pickup tube 6 and a blue color image pickup tube 8 by using transmitted correction data. In such a way, an operator can be released from complicated work such as to exchange the correction data, and registration defect can be completely eliminated.

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