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1. 发明专利

JPH04359836A COLOR CATHODE-RAY TUBE INSPECTING METHOD AND CATHODE-RAY TUBE INSPECTED IN THE METHOD 失效
公开(公告)号：JPH04359836A
公开(公告)日：1992-12-14
申请号：JP13626191
申请日：1991-06-07
申请人： HITACHI LTD
发明人： KATSUME YASUTOSHI
IPC分类号： H01J9/42
摘要： PURPOSE:To provide a color cathode-ray tube with good degree-of-vacuum holding performance and the electron emission characteristic holding performance by drawing a white with an electron beam under the specified conditions in each of minor divisions for a specific period of time one by one, and measuring and inspecting continuously the cathode current of each of the electron guns for three primary colors within that period of time. CONSTITUTION:A deflection yoke 2 and a socket 3 are mounted on a color cathode-ray tube to be inspected 1. From a power supply device 4, the respective specified voltage are supplied to the electrodes of this cathode-ray tube 1. A deflecting power supply 5 draws raster in a specified minor division through the yoke 2, and the cathode amperage of the cathode-ray tube 1 is recorded continuously by a recording ammeter 6. The scan region wider than normal scanning area corresponding to the fluorescent surface 7 is divided into minor divisions, for example a-g, and a white raster is drawn in each division. In each minor division, the fluorescent surface, shadow mask, glass bulb inner wall surface, and inner field are bombarded with electron beam, which should lower the degree-of-vacuum holding performance and the electron emission characteristic holding performance under the condition that contaminant substances remain in adsorption to the surfaces of the members.

2. 发明专利

JPH01296538A GETTER FLASHING DEVICE 失效
公开(公告)号：JPH01296538A
公开(公告)日：1989-11-29
申请号：JP12570188
申请日：1988-05-25
申请人： HITACHI LTD
发明人： KATSUME YASUTOSHI
IPC分类号： H01J9/39
摘要： PURPOSE:To minimize the dispersion of the getter scatter quantity by providing a cathode-ray tube positioning device positioning the cathode-ray tube held by a pallet when the pallet is lifted by a pallet lifting device. CONSTITUTION:A bulb receiver 4 is positioned and mounted on a pallet main body 3, a cathode-ray tube 5 is held by the bulb receiver 4. When a pallet 2 is conveyed by a conveyor 1 and the cathode-ray tube 5 is located in front of a high-frequency oscillator 6, the pallet main body 3 is stopped by a stopper. A pallet lifting device 7 is then lifted, the bulb receiver 4 is lifted and separated from the pallet main body 3, the cathode-ray tube 5 is inserted into a cathode- ray tube positioning device 8 set at the opened state. The cathode-ray tube positioning device 8 is closed, the cathode-ray tube 5 is pinched and positioned. The high-frequency oscillator 6 is operated under this condition to perform the getter flash of the cathode-ray tube 5.

3. 发明专利

JPH0447637A MANUFACTURE OF COLOR CATHODE-RAY TUBE 失效
公开(公告)号：JPH0447637A
公开(公告)日：1992-02-17
申请号：JP15162390
申请日：1990-06-12
申请人： HITACHI LTD
发明人： KATSUME YASUTOSHI
IPC分类号： H01J9/44
摘要： PURPOSE:To remove A stray by either a G2 electrode lower plane or its lower electrode, especially a G1 electrode system, to improve withstand voltage of the G1 electrode system by carrying G2 electrode indirect knocking in the knocking process. CONSTITUTION:After sealing, evacuation, and gettering are carried out, front knocking and load-aging are carried out. During the load-aging, a Ba oxide is vaporized from a cathode 7 and adheres to the surface of a G1 electrode 1. Owing to this, A stray of the G1 system is generated and it causes the decreasing of withstand voltage. As measures against it, G2 indirect knocking is carried out during the knocking process carried out after that, so that spark is generated between a G2 electrode and a G1 electrode and the Ba oxide adhering to the surface and the periphery of a hole of the G1 electrode is thus removed and cleaning is carried out to improve withstand voltage.

4. 发明专利

JPH0428144A MANUFACTURE OF COLOR CATHODE-RAY TUBE AND DEVICE THEREFOR 失效
公开(公告)号：JPH0428144A
公开(公告)日：1992-01-30
申请号：JP13021490
申请日：1990-05-22
申请人： HITACHI LTD
发明人： KATSUME YASUTOSHI
IPC分类号： H01J9/44 , H01J9/39
摘要： PURPOSE:To raise the regeneration rate on a product of which a manufacturing efficiency is very high but its withstand voltage characteristic does not reach a reference value by arranging a process to heat G1 electrode series after load aging and setting so that the maximum temperature of electrode heating up to ITC process does not exceed a prescribed temperature. CONSTITUTION:After having finished load aging, an electron emitting substance from a cathode stuck to both G1 electrode and G2 electrode during load aging is heated and dissipated in a G1 electrode series heating B process 71. Moreover, in a primary inspection 9, a secondary inspection 11 and the final inspection 15, the one incapable of obtaining a prescribed withstand voltage performance is sent to a regeneration process. In the regeneration process, the sticking electron emitting substance is further dissipated by repeating the G1 electrode heating B process one or several times so as to recover the withstand voltage performance. For example, even after ITC 13, the G1 electrode series heating B process 72 is arranged. Here, the maximum temperature of heating is set so as not to exceed 500 deg.C.

5. 发明专利

JPS63193436A MANUFACTURE OF DAZZLING-PROOF CATHODE-RAY TUBE 失效
公开(公告)号：JPS63193436A
公开(公告)日：1988-08-10
申请号：JP2451887
申请日：1987-02-06
申请人： HITACHI LTD
发明人： KATSUME YASUTOSHI
IPC分类号： H01J9/20 , H01J29/88
摘要： PURPOSE:To make a degree of interference light to the minimum by spraying coating liquid of silica coat on the face surface of a cathode-ray tube with a spray having specific air pressure for forming unevenness with film thickness less than 1mum on the face surface. CONSTITUTION:Coating liquid of silica coat at a temperature 10-30 deg.C is sprayed on the face surface 2 of a cathode-ray tube with a spray 1 with air pressure 2.5-3.5kg/cm to form an uneven film 4 having film thickness less than 1mum on the face surface 2. That is, when the temperature of the coating liquid is 10-30 deg.C and the air pressure is 2.5-3.5kg/cm , an amount of liquid to be used remains at the minimum, the liquid becomes scattering particles 3a having an appropriate diameter to form the stable uneven film having film thickness less than 1mum. Thereby, picture display of good quality can be obtained while making a degree of interference light to the minimum.

6. 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.

7. 发明专利

JPH0265038A COLOR CATHODE-RAY TUBE 失效
公开(公告)号：JPH0265038A
公开(公告)日：1990-03-05
申请号：JP21497388
申请日：1988-08-31
申请人： HITACHI LTD
发明人： KATSUME YASUTOSHI
IPC分类号： H01J29/76
摘要： PURPOSE:To improve the adhesive strength and improve the work efficiency of the deflection yoke adjustment by providing the outer circumference of a coil case outer frame with a straight line portion and applying a correction magnet to the straight line portion. CONSTITUTION:The outer circumference of a coil case outer frame 3 of a deflection yoke is formed with a plurality of straight line portions 4. Because the straight line portion 4 forms a plane, a surface contact is attained when a correction magnet 2 is applied to the straight line portion 4, This increases the adhesive strength to reduce the possibility of displacement or coming off of the magnet after it is applied. Because the correction magnet 2 is applied to the coil case outer frame 3, vertical and horizontal correction works are easily carried out to improve work efficiency.

8. 发明专利

JPH01243338A MANUFACTURE OF CATHODE-RAY TUBE AND DEVICE THEREOF 失效
公开(公告)号：JPH01243338A
公开(公告)日：1989-09-28
申请号：JP32062388
申请日：1988-12-21
申请人： HITACHI LTD
发明人： YOKOSANAI TERUO , KATSUME YASUTOSHI , ONO KATSUHISA , KARASAWA TAKUMI
IPC分类号： H01J9/34 , H01J9/44 , H01J9/46
摘要： PURPOSE:To simply dry adhesive resin in a short time, make a drying furnace small-sized, and improve reliability by mounting a cathode-ray tube on the pallet on a floor conveyor with its face put downward. CONSTITUTION:A cathode-ray tube 1 is mounted on the pallet 7 on a floor conveyor 6 with its face put downward. No deflection occurs at the portion of a base 2 during conveyance, the position of the base 2 is made constant, a drying furnace 9 provided in the middle of the conveyor 6 can be made small- sized, adhesive resin 3 can be effectively dried by the small capacity of an electric heater 10. The conveyor 6 is for knocking, when the pallet 7 is commonly used for knocking, a socket can be automatically and easily fitted by mounting the socket for knocking and a power feed device on the conveyor 6 after the cathode-ray tube 1 passing the drying furnace 9, the knocking voltage can be applied for the fitting.

9. 发明专利

JPH03297032A DEVICE FOR VISUAL INSPECTION OF ANODE TERMINAL INSULATING FILM OF CATHODE-RAY TUBE 失效
公开(公告)号：JPH03297032A
公开(公告)日：1991-12-27
申请号：JP9765590
申请日：1990-04-16
申请人： HITACHI LTD
发明人： KURIBAYASHI YUKIO , KATSUME YASUTOSHI
IPC分类号： H01J9/42 , H01J9/20 , H01J29/88
摘要： PURPOSE:To select products, which are free from flowing of a large leak current when a high voltage is impressed, automatically by non-contact system by examining the external color of a CRT anode terminal itself plus its surroundings by a color extract sensor, carrying out an image treatment of an insulation film applied to the surrounding of the anode terminal, and thereby performing the appearance inspection of the insulation film. CONSTITUTION:A CRT coming up being transported on a pallet 9 is stopped, and the coating condition of an insulation film 3 around an anode terminal 4 at the funnel 1 is sensed by a color extract sensor 7, and an image treatment is made using a color extract judging device 8, followed by judgement about acceptability of the insulation film appearance and shape through measurement of four-direction dimensions (a), (b), (c), (d) over the insulation film applied area. It is judged as acceptable about the roundness if a=b=c=d, and about dislocations right and left and in vertical direction if (a-b) and (c-d) calculated lies within respective specified ranges. This enables selection of products exhibiting high reliability always in different environments.

10. 发明专利

JPH01187731A IMAGE INSPECTION METHOD FOR CATHODE-RAY TUBE 失效
公开(公告)号：JPH01187731A
公开(公告)日：1989-07-27
申请号：JP1060588
申请日：1988-01-22
申请人： HITACHI LTD
发明人： KATSUME YASUTOSHI
IPC分类号： H01J9/44
摘要： PURPOSE:To remove inspection mistakes due to human sensitivity deterioration as well as make a spot position and a free spot position inspectable by detecting a mask pattern with mask-pattern recognizing cameras and detecting spot positions with a spot-position recognizing camera. CONSTITUTION:By means of mask-pattern recognizing cameras 2 and 3 arranged on the opposite positions to the major-axis center position of a cathode-ray tube 1, a mask pattern on the major axis indicating the mask center position is detected. By means of a spot-position recognizing camera 4 arranged on the position corresponding to the center position of the cathode-ray tube, spot positions, when the electromagnet of an electron-beam landing position adjusting device 6 is turned on and off, are also detected. The detected information is processed by an image processing device 5. Therefore, by detecting the mask pattern with the mask-pattern recognizing cameras 2 and 3, the geometrical panel center position 14 can be recognized, and by detecting two spot positions 16 and 17 with the spot-position recognizing camera 4, a spot position and a free spot position can be recognized. Thereby, the inspection accuracy can be improved as well as inspection mistakes can be excluded.

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