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31. 发明专利

JPS61152175A VIDEO CAMERA 失效
公开(公告)号：JPS61152175A
公开(公告)日：1986-07-10
申请号：JP27299284
申请日：1984-12-26
申请人： HITACHI LTD
发明人： KANAZAWA TORU
IPC分类号： H04N5/225 , G11B20/04 , H04B3/10
摘要： PURPOSE:To fix the gain of a sound circuit of a VTR from a video camera by adding the output signal in a prescribed level of an oscillator having a frequency other than the audio frequency and a sound signal and supplying the addition result to the VTR. CONSTITUTION:A microphone amplifier 3 amplifies the sound signal of a microphone 2 and applies it to an adding circuit 5, and an oscillator 4 outputs a signal of 20kHz and 10dB to the circuit 5. The circuit 5 adds outputs of the amplifier 3 and the oscillator 4 and inputs the addition result to an automatic gain control circuit 9 and a sound amplifier 10 of a VTR7, and the circuit 9 reduces the gain of the amplifier by the input of the signal of the oscillator 4. Thus, the gain of the amplifier 10 is constant unless the sound signal level of the circuit 5 inputted to the circuit 9 exceeds 10dB, and the sound input signal and the audio output signal of the amplifier 10 are proportional to each other, and the unnatural phenomenon that the sound of a sound output terminal 11 disappears suddenly by the input of the external sounds.

32. 发明专利

JP2003087651A IMAGING APPARATUS 审中-公开
公开(公告)号：JP2003087651A
公开(公告)日：2003-03-20
申请号：JP2001274703
申请日：2001-09-11
申请人： HITACHI LTD
发明人： MIMURA MASAO , KANAZAWA TORU
IPC分类号： G06T1/00 , H04N1/40 , H04N5/238 , H04N101/00
摘要： PROBLEM TO BE SOLVED: To provide an electronic still camera to obtain a proper video signal by automatically correcting black level depression due to a photogenic subject condition in still picture photography and a drop in signal level due to underexposure before digital image processing. SOLUTION: This electronic digital still camera is equipped with an A/D converting means 32 which converts a still picture video signal outputted from an imaging device into a digital signal, a memory means 33 which stores the digital still picture video signal converted into the digital signal by the A/D converting means 32, a signal level detecting means 34 which divides the digital still picture video signal stored in the memory means 33 into at least two or more areas and detects their video signal levels, a control means 38 which inputs the output signal of the signal level detecting means 34 and computes correction quantities of the video signal levels in the respective areas, and a digital amplification factor varying means 35 which varies the amplification factor by the areas of the digital still picture video signal stored in the memory means 33 according to the correction quantities.

33. 发明专利

JP2001053985A PICTURE SIGNAL PROCESSOR 失效
公开(公告)号：JP2001053985A
公开(公告)日：2001-02-23
申请号：JP22817599
申请日：1999-08-12
申请人： HITACHI LTD
发明人： IGUCHI TAKUYA , NISHIMURA RYUSHI , NISHIZAWA AKIHITO , SATO KAZUYUKI , KANAZAWA TORU
IPC分类号： H04N5/208
摘要： PROBLEM TO BE SOLVED: To improve the quality of a still picture by suppressing the occurrence of dark edge caused by a contour correcting processing for improving resolution feeling. SOLUTION: A contour correcting signal generation part 13 extracts high frequency components from an inputted picture signal 11 to output a contour correcting signal consisting of pre-shoot and over-shoot. The contour correcting signal from the part 13 is restricted to avoid becoming equal to or lower than a prescribed negative limit level by a limiter 4. The output signal of a limiter 14 is amplified by a gain adjusting part 15, and the amplified contour correcting signal and the signal 11 are added by an adder 16. By increasing the gain of the part 15 compared with 0, the signal 11 is added with the contour correcting signal to correct a contour and a picture signal made to be equal to or higher than the limit level is outputted on the negative side of the output signal. Thus, the generation of a black edge is suppressed to improve the quality of a still picture.

34. 发明专利

JPH09281264A FUEL SPACER AND FUEL ASSEMBLY OF BOILING WATER TYPE NUCLEAR REACTOR 失效
公开(公告)号：JPH09281264A
公开(公告)日：1997-10-31
申请号：JP9505296
申请日：1996-04-17
申请人： HITACHI LTD
发明人： NAGAYOSHI TAKUJI , NISHIDA KOJI , KANAZAWA TORU
IPC分类号： G21C3/344
摘要： PROBLEM TO BE SOLVED: To improve the thermal allowance of a fuel assembly. SOLUTION: The outside diameter of round cell members 1 in which fuel rods 33 are passed and supported is smaller than the distances between the centers of the fuel rods 33. The side walls thereof include only the apertures 4 limited to be necessary for forming stoppers 11 which are means for supporting the fuel rods 33 and supporting and passing springs 13. The thickness of the round cells 1 is the value of the smallest possible extent at which the strength necessary for holding the spacings between the fuel rods 33 determined by the characteristics of the materials is assured after the necessary reliability is assured. Further, the flow passages having the area to allow the passage of the steam entraining the liquid films and liquid drops on the surfaces of the fuel rods 33 exclusive of the closure of part by the stoppers 11 and the springs 13 are assured between the inside walls of the round cells 1 and the outside walls of the fuel rods 33.

35. 发明专利

JPH09270943A VIDEO CAMERA 失效
公开(公告)号：JPH09270943A
公开(公告)日：1997-10-14
申请号：JP7971196
申请日：1996-04-02
申请人： HITACHI LTD
发明人： KANAZAWA TORU
IPC分类号： H04N5/225 , H04N9/07
摘要： PROBLEM TO BE SOLVED: To allow a user to easily observe a low and medium luminance part of a monitor image displayed on a view finder. SOLUTION: A microprocessor 8 averages a luminance signal outputted from a signal processing circuit 5 for a certain period and controls an amplification factor of variable gain amplifier circuits 9, 10, depending on the average value and a bright and dark monitor image is displayed by increasing a signal level of a luminance signal and a chrominance signal fed to a view finder 14 with respect to a video signal including a high luminance part.

36. 发明专利

JPH0818873A VIDEO CAMERA 失效
公开(公告)号：JPH0818873A
公开(公告)日：1996-01-19
申请号：JP15112094
申请日：1994-07-01
申请人： HITACHI LTD
发明人： KANAZAWA TORU , KATO MINORU
IPC分类号： H04N5/217 , H04N5/225 , H04N5/335 , H04N5/341 , H04N5/367 , H04N5/378
摘要： PURPOSE:To surely correct a white level defect caused by a temperature rise or the like by comparing position information of a defective picture element obtained in the defective picture element detection mode with position information of a defective picture element stored already and storing newly only new position information to a defective picture element position storage means. CONSTITUTION:A white level defect correction circuit 7 keeps closing an iris 2 after application of power to prevent incident light onto a solid-state image pickup element 4. Furthermore, in order to easily detect a white level defect, the gain of an AGC circuit 5 is increased. A signal is read from each picture element of the solid-state image pickup element 4 synchronously with a pulse of a synchronizing signal generating circuit 3 while keeping a closing iris and the increased gain. Then the signal level is compared with a threshold level and the white level defect correction circuit 7 gives position information of the picture element from which a higher level of signal is obtained than the threshold level to a microprocessor 11. When the received position information is not in the memory 10 in comparison with the position information having been stored in the past in the memory 10 and the information is not in the memory 10, the information is stored in the memory 10.

37. 发明专利

JPH06186368A FUEL ASSEMBLY FOR BOILING WATER REACTOR 失效
公开(公告)号：JPH06186368A
公开(公告)日：1994-07-08
申请号：JP33579492
申请日：1992-12-16
申请人： HITACHI LTD
发明人： NAGAYOSHI HIROYUKI , NISHIDA KOJI , KANAZAWA TORU
IPC分类号： G21C3/344
摘要： PURPOSE:To enhance the thermal margin of fuel assembly without causing significant increase of pressure drop by reducing the projection area of fuel spacer without altering the plate thickness of tubular cell thereby sustaining corrosion resistance of the fuel spacer. CONSTITUTION:Outer diameter of a tubular cell 1, through which a fuel rod penetrates, is set shorter than the distance between the centers of adjacent fuel rods which are jointed through a planar coupling part 2 thus reducing the projection area of fuel spacer.

38. 发明专利

JPH05346473A 失效
公开(公告)号：JPH05346473A
公开(公告)日：1993-12-27
申请号：JP15471592
申请日：1992-06-15
申请人： HITACHI LTD
发明人： KANAZAWA TORU , YOKOMIZO OSAMU , KASHIWAI SHINICHI , ORII AKIHITO , NISHIDA KOJI , NAGAYOSHI TAKUJI
IPC分类号： G21C3/322 , G21C3/326
摘要： PURPOSE:To promote a moderation effect of a fuel assembly upper part and reduce output mismatch accompanying the introduction of a partial length fuel rod because a cylindrical body is filled with a coolant (moderator). CONSTITUTION:A cylindrical body 8 is set from the upper end of a partial length fuel rod 7 to an upper part tie plate. The upper end part of the cylindrical body 8 is supported with the upper part tie plate and the lower end part thereof is jointed with engagement and the like with the upper end of the partial length fuel rod 7. The cylindrical body 8 has a plurality of opening parts 9 in the side of the upper end part thereof. A coolant is allowed to flow in the inside of the cylindrical body 8 from the opening parts 9 and the inside of the cylindrical body 8 is filled with the coolant. The cylindrical body 8 filled with the inside coolant has the same effect as a water rod.

39. 发明专利

JPH05249275A 失效
公开(公告)号：JPH05249275A
公开(公告)日：1993-09-28
申请号：JP15913492
申请日：1992-06-18
申请人： HITACHI LTD
发明人： KASHIWAI SHINICHI , YOKOMIZO OSAMU , ORII AKIHITO , NISHIDA KOJI , KANAZAWA TORU , MORIYA KIMIAKI
IPC分类号： G21C15/02 , G21C5/00 , G21C5/06 , G21C5/10
摘要： PURPOSE:To provide a boiling water reactor in which two-phase flow instability in reactor fuel assemblies hardly occurs. CONSTITUTION:Below a partition plate 26 supported by a control rod drive mechanism housing 8 in a reactor pressure vessel, bottom flow channels are formed and coolant guide tubes 28 opening below the partition plate 26 is stood straight on the partition plate 26. Upper periphery of the coolant guide tubes 28 is restrained by a coupler part 38a of square grid and is fixed so that coolant inlet of fuel assemblies 3 is connected to the coolant guide tubes 28. As the flow loss of coolant becomes small and flow instability of coolant in the reactor fuel assemblies hardly occurs and thus, the lowering of limit power ratio during a pump trip is suppressed.

40. 发明专利

JPH04196892A COLOR VIDEO CAMERA 失效
公开(公告)号：JPH04196892A
公开(公告)日：1992-07-16
申请号：JP32300590
申请日：1990-11-28
申请人： HITACHI LTD
发明人： KANAZAWA TORU , KATO MINORU
IPC分类号： H04N9/73
摘要： PURPOSE:To prevent such a malfunction as a screen hue is varied carelessly due to an instantaneous color temperature variation by constituting the video camera so that when a color temperature of illumination of an object to be photographed is varied, an automatic white adjusting circuit operates only in the case its state is continued exceeding a certain prescribed time. CONSTITUTION:A video signal read out of an image pickup element 1 is separated into a luminance signal (y) and color signals (R, B) in a signal processing circuit 2. Thereafter, they are calculated by a matrix circuit 4, two color difference signals R-Y, B-Y are generated, and generated white adjustment control signals are fed back to gain control circuits 3r, 3b in the end, and white adjustment is executed so as to become R-Y=0, and B-Y=0 in an output of the matrix circuit 4. Subsequently, in the case a color temperature of illumination of an object to be photographed is varied, when its state is continued exceeding a prescribed time, an automatic white adjusting circuit is operated. In such a way, such a malfunction as a hue of a video signal in the course of photographing is varied carelessly by an instantaneous color temperature variation can be eliminated.

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