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1. 发明专利

JPH01169836A HOT FIT REINFORCING DEVICE FOR CATHODE-RAY TUBE 失效
公开(公告)号：JPH01169836A
公开(公告)日：1989-07-05
申请号：JP32708887
申请日：1987-12-25
申请人： HITACHI LTD , HITACHI DEVICE ENG , HITACHI CHIBA ELECTRON KK
发明人： KARASAWA TAKUMI , ATOBE TAKASHI , NAKAYAMA HIROTSUGU , SUZUKI YOSHINORI
IPC分类号： H01J9/24 , H01J29/87
摘要： PURPOSE:To enable uniform expansion of the whole surfaces of a reinforcing metal and accomplishes high quality by sensing the inside and outside temps. of the reinforcing metal, and by controlling the heating power of a high frequency heating means on the basis of the result thus obtained. CONSTITUTION:A reinforcing metal 2 is fitted on the periphery of a high frequency coil 10, and from a high frequency power supply 11, electric power is supplied to this high frequency coil 10 through a connecting cable 12, and the reinforcing metal 2 is heated by this high frequency coil 10. At this time, the electric heating power is varied so that the temp. rise per unit time is constant while the inside and outside temps. of the reinforcing metal 2 are monitored by temp. sensors 13, 14, and thereby the heating is controlled with the accumulated heat portion included. This can expand the reinforcing metal uniformly, and stable hot fitting works can be done which are free from uneven baking and poor appearance to lead to enhancement of the quality.

2. 发明专利

JPH0785793A METHOD AND DEVICE FOR FLASHING GATTER OF CATHODE-RAY TUBE 失效
公开(公告)号：JPH0785793A
公开(公告)日：1995-03-31
申请号：JP22987893
申请日：1993-09-16
申请人： HITACHI LTD , HITACHI DEVICE ENG
发明人： KARASAWA TAKUMI , NAKAYAMA HIROTSUGU
IPC分类号： H01J9/39
摘要： PURPOSE:To precisely detect a getter flashed state with an inexpensive device by detecting the fluctuation of the basic wave and higher harmonics of a high frequency output carried to a load coil for heating a getter material. CONSTITUTION:A high frequency, current in a load coil 5 is detected by a detecting coil 31. The frequency difference of the fundamental wave of the detected high frequency output 31a with the output 35a of a standard oscillator 35 is determined by a frequency comparator 32, and the fluctuating amount of the initial fundamental wave is inputted to a frequency-voltage converter 36 as a DC output 32a, and then inputted to a processing device 37 as a voltage output 36a. The third and fifth higher harmonics of the high frequency output 31a detected by the coil 31 are taken out by band filters 33, 34, detected by wave detectors 38, 39, and inputted to the device 37 as wave detection outputs 38a, 39a. The device 37 compares the outputs 36a, 38a, 39a with the standard values, determines the time of reacting a light emitting state when the fusion and evaporation of a getter material 4 is started, and outputs it as a getter flash output to a control device by the output 37a.

3. 发明专利

JP2003248464A LIQUID CRYSTAL DISPLAY DEVICE AND ITS DRIVING METHOD 审中-公开
公开(公告)号：JP2003248464A
公开(公告)日：2003-09-05
申请号：JP2002047699
申请日：2002-02-25
申请人： HITACHI LTD , HITACHI DEVICE ENG
发明人： IWASAKI SHINICHI , KARASAWA TAKUMI , IKEDA KAZUFUMI , KANEKI TAKESHI , SUZUKI ATSUO , WATANABE YOICHI
IPC分类号： G02F1/133 , G09G3/20 , G09G3/36
摘要： PROBLEM TO BE SOLVED: To provide a driving method of a liquid crystal display device, by which electromagnetic wave noise radiated from the device itself can be reduced than heretofore. SOLUTION: The liquid crystal display device has a liquid crystal display panel having a plurality of pixels, a driving means which outputs gradation voltages corresponding to display data being inputted, a display control means which supplies the display data being inputted from the external to the driving means and bus lines through which the display data being supplied from the display control means are inputted to the driving means. When the data values of the all display data are '1' in the display control means, the data values of specific display data among the display data are reversed so that the voltage on one of the lines becomes a first level and the voltage on the other line becomes a second level in the mutually adjacent lines of the bus lines and the values are supplied to the driving means. COPYRIGHT: (C)2003,JPO

4. 发明专利

JPH0279329A TRANSFER DEVICE 失效
公开(公告)号：JPH0279329A
公开(公告)日：1990-03-19
申请号：JP23002888
申请日：1988-09-16
申请人： HITACHI LTD , HITACHI DEVICE ENG
发明人： NAKAYAMA HIROTSUGU , KARASAWA TAKUMI
IPC分类号： H01J9/46
摘要： PURPOSE:To shorten time of transfer operation and to prevent adverse effect on a color cathode ray tube by optically detecting the inclination of the color cathode ray tube, and modifying the angle to accord the holding part with the inclination of the color cathode ray tube by the results of this detection. CONSTITUTION:A holding part 5 is provided freely in rotation at a movable part 3 through a ball joint 4, and the holding part 5 sucks a color cathode ray tube 1 by vacuum by ON-OFF of a vacuum means, and an angle modification part 6 to rotate the holding part 5 is attached to the movable part 3. When the movable part 3 lowers and the holding part 5 abuts on the color cathode ray tube 1, the holding part 5 becomes vacuum, and the holding part 5 sucks the color cathode ray tube 1. That is, the holding part 5 is modified in accordance with the posture of the color cathode ray tube 1. The color cathode ray tube 1 is held steadily by the holding part 5, and the holding operation can be done promptly, and the time can be shortened. Also since the color cathode ray tube 1 is not rectified mechanically, the color cathode ray tube 1 does not suffer adverse effect.

5. 发明专利

JPH09294218A CATHODE-RAY TUBE DISPLAY DEVICE 失效
公开(公告)号：JPH09294218A
公开(公告)日：1997-11-11
申请号：JP10770996
申请日：1996-04-26
申请人： HITACHI LTD
发明人： KARASAWA TAKUMI
IPC分类号： H04N3/26
摘要： PROBLEM TO BE SOLVED: To suppress occurrence waveform distortion by allowing an address generating circuit to access a focus data storage memory based on an address generated by horizontal and vertical deflection signals and applying an optimum focus voltage in a division area obtained from read data to a focus electrode. SOLUTION: A deflection yoke 6 of a cathode ray tube 1 deflects an electron beam emitted from an electron gun 5 while being subject to intensity modulation with an image signal from a video circuit 7 into two directions, horizontal and vertical directions to display an image on a screen 1a. The screen 1a is divided into a plurality of areas in horizontal and vertical directions and a focus voltage optimum to each area is applied to a focus electrode of the electron gun 5. A focus voltage from a focus voltage generating circuit 4 is generated by an address outputted from an address generating circuit 2 based on a horizontal deflection signal fH and a vertical deflection signal fV. Thus, the focus on the entire screen is improved and display with high image quality is conducted.

6. 发明专利

JPH08213084A SOCKET FOR CATHODE-RAY TUBE 失效
公开(公告)号：JPH08213084A
公开(公告)日：1996-08-20
申请号：JP1767695
申请日：1995-02-06
申请人： HITACHI LTD
发明人： NAKAMURA TOSHIHARU , KARASAWA TAKUMI , SHIMOKAWA TAKASHI
IPC分类号： H01R13/11
摘要： PURPOSE: To prevent upward parting of a base, and dispense with a base push- down work process before an adhesive is dried by arranging a pressing means to press the base against a neck part when a socket is pulled out. CONSTITUTION: A shaft 10 is slidably arranged in a central part of a socket main body 7, and a base push-down part 10a on the tip of the shaft 10 is installed on the shaft 10, and a spring 11 is installed in an inner wall part of the socket main body 7, and the shaft 10 is energized to the base 3 side. Therefore, when a socket 5 is installed on a step pin 2 and a base 3, the shaft 10 relatively rises to the main body 7 by the base 3, and the spring 11 bends, and the base 3 is put in a condition of being pressed against a neck part 1 by energizing force of the spring 11.

7. 发明专利

JPH08116194A STRUCTURE HAVING RESISTANCE TO ELECTROMAGNETIC INTERFERENCE 失效
公开(公告)号：JPH08116194A
公开(公告)日：1996-05-07
申请号：JP25321694
申请日：1994-10-19
申请人： HITACHI LTD
发明人： KARASAWA TAKUMI , NAKAZAWA HIDEO
IPC分类号： H05K9/00
摘要： PURPOSE: To provide a protective structure resistant to electromagnetic interference in low-frequency range at low cost. CONSTITUTION: A disk-type antenna 4 is provided on a face 1a vertical to the direction (P) in which electromagnetic waves are reduced. A terminating resistor 5 matching with the characteristic impedance of the antenna 4 is provided between the antenna terminals. Even a small disk-type antenna 4 has a gain in a wide frequency range. The energy captured by the antenna 4 is consumed by the terminating resistor 5, and the shielding effect becomes larger than a conventional one. In addition directivity in all directions can be obtained, and the shielding effect is sufficient even for the electromagnetic wave in any direction other than the vertical direction to the disk-type antenna.

8. 发明专利

JPH0778563A CONVERGENCE MEASURING METHOD AND DEVICE FOR COLOR CATHODE-RAY TUBE 失效
公开(公告)号：JPH0778563A
公开(公告)日：1995-03-20
申请号：JP22545593
申请日：1993-09-10
申请人： HITACHI LTD , HITACHI COMMUNICATION SYSTEM
发明人： KARASAWA TAKUMI , SHIRAISHI TOSHIRO , KINOSHITA MASAO
IPC分类号： H01J9/42 , H04N17/04
摘要： PURPOSE:To provide high precision measurement even in using a low-cost color camera, provide measurement without changing light emission color even in using a monochrome camera, and match light emission positions easily in the case of sectional image taking of a light emission surface using plural cameras. CONSTITUTION:A device is provided with a camera 11 to take an image of an image plane of a color cathode-ray tube 10, memories 4R, 4G, 4B to store light emission information for three primary colors under address designation, and counters 3, 5 to generate address signals for the memories 4R, 4G, 4B having constant phase relation to a horizontal synchronizing signal HD and a vertical synchronizing signal VD. Signal outputs 8R, 8G, 8B for the three primary colors at addresses in the memories 4R, 4G, 4B designated by the counters 3, 5 are inputted to a drive circuit of the color cathode-ray tube 10.

9. 发明专利

JPH0778558A SHIELD WIRE HEATING METHOD AND HIGH FREQUENCY HEATING DEVICE OF ELECTRON GUN FOR CATHODE-RAY TUBE 失效
公开(公告)号：JPH0778558A
公开(公告)日：1995-03-20
申请号：JP22545393
申请日：1993-09-10
申请人： HITACHI LTD
发明人： KARASAWA TAKUMI , IGARASHI MITSURU
IPC分类号： H01J9/20
摘要： PURPOSE:To restrict heating of an unnecessary part to the minimum by heating a shield wire, setting the shorter axis side of a noncircular high frequency coil in the direction of the shield wire. CONSTITUTION:A sheild wire 3 surrounds a bead glass 7 holding an electrode 6. A high frequency coil 4 is formed of a copper pipe or the like in a noncircular form such as an ellipse, and a diameter of a longer axis part 9 is set to be twice or more a diameter of a shorter axis part 8. This shorter axis part 8 of the coil 4 is set on the wire 3 side, and the wire 3 is heated. Because the shorter axis part 8 is thus set to be close to the wire 3, the wire 3 can be heated sufficiently. Since an electrode 6 which is not to be heated desirably is positioned on the side of the longer axis part 9, heating power to the electrode 6 is reduced. Heating of the unnecessary part can thus be restricted, thereby deterioration of electron emission characteristics by emission of residual gas at a metal inner part can thus be prevented.

10. 发明专利

JPH04218237A MANUFACTURE OF CATHODE-RAY TUBE 失效
公开(公告)号：JPH04218237A
公开(公告)日：1992-08-07
申请号：JP9030991
申请日：1991-04-22
申请人： HITACHI LTD
发明人： TOMIYAMA KOZO , SHODA TAIRA , SHIMOKAWA TAKASHI , KURIBAYASHI YUKIO , KATSUME YASUTOSHI , KARASAWA TAKUMI
IPC分类号： H01J9/44 , H01J29/02
摘要： PURPOSE:To ensure generation of knocking from a lower electrode so as to prevent stray malfunction in a knocking process of a cathode-ray tube by applying a voltage to be applied to anode to a lower electrode of convergence voltage and the like while separating the voltage into partial divided voltage with high resistance. CONSTITUTION:At the initial time when a voltage Eb is applied to an anode, electric potential difference VG6-3 and VG3 are respectively 30KV and 15KV while the partial divided voltage according to respective resistance values are EbXR2/(R2+R3). Electric discharge occurred between the anode G6 and converging electrodes G5/G3, or leakage in current occurred. All the resistance between the converging electrodes and earth becomes low thereby and the electric potential difference VG6-3 becomes high while the difference VG3 becomes low. At every time such phenomena occur continuously in sequence, spark discharge is generated repeatedly from the electrodes G5/G3 to shielding electrodes G2/G4, and thus knocking with respect to the shielding electrode is carried out effectively. It is thus possible to prevent stray malfunction from the shielding electrodes.

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