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1. 发明专利

JPH09245659A COLOR CATHODE-RAY TUBE 失效
公开(公告)号：JPH09245659A
公开(公告)日：1997-09-19
申请号：JP4634496
申请日：1996-03-04
申请人： HITACHI LTD , HITACHI CHIBA ELECTRON KK
发明人： MIYAZAKI TSUTOMU , SAITO HOGEN
IPC分类号： H01J29/07
摘要： PROBLEM TO BE SOLVED: To provide a color cathode-ray tube having a shadow-mask assembly such that positioning of a shadow mask with respect to a support frame can be effected accurately and efficiently. SOLUTION: This cathode-ray tube has a shadow-mask assembly consisting of a shadow mask 6 and a support frame 7, the skirt 6b of the shadow mask 6 being fitted inside the side walls 7a of the support frame 7, with the skirt 6b and the side walls 7a joined together by welding at several positions. In this case, notches 15 for positioning the shadow mask are formed in the upper edges of the four side walls 7a of the support frame 7, and positioning of the shadow mask 6 with respect to the support frame 7 is effected via the shadow- mask-positioning notches 15.

2. 发明专利

JPH09244250A RESIST COATING DEVICE 失效
公开(公告)号：JPH09244250A
公开(公告)日：1997-09-19
申请号：JP5053496
申请日：1996-03-07
申请人： HITACHI LTD , HITACHI DEVICE ENG , HITACHI CHIBA ELECTRON KK
发明人： ICHIMURA YUKIO , OFUJI YOSHIHIRO , KONO KAZUHIRO , KATAOKA SHINYA , TANIGUCHI HIDEAKI , YOSHIDA KAZUTOSHI , SHIBA MITSUAKI , NAMIKI JUNICHI
IPC分类号： G03F7/16 , G02B5/20 , G02F1/1335
摘要： PROBLEM TO BE SOLVED: To prevent the soiling at the end part of a glass substrate by minimizing the difference of the level of a resist solution film directly after coating and scooping up a resist at the end part of a resist coating roller. SOLUTION: A device is provided with a substrate sending part for successively sending the glass substrate 1 and a resist coating part composed of a press roller 2 and the resist coating roller 3 oppositely arranged below the press roller 2 and the resist is applied on one surface of the resist coating roller 3 side of the glass substrate 1 by catching the resist by the resist roller 3 at the time of passing the glass substrate 1 between the press roller 2 and the resist coating roller 3. In such a case, the surface of the resist coating roller 3 is constituted so that a large diameter wire 3a is closely wound on the surface as an under layer and a small diameter wire 3b is wound so as to bury a part or all of valley parts produced by closely winding the large diameter wire 3a as an upper layer.

3. 发明专利

JPH09199015A METHOD FOR SURFACE TREATMENT OF SUPPORT FRAME FOR SHADOW MASK 失效
公开(公告)号：JPH09199015A
公开(公告)日：1997-07-31
申请号：JP804496
申请日：1996-01-22
申请人： HITACHI LTD , HITACHI CHIBA ELECTRON KK
发明人： SAITO HOGEN , OGISHIMA YOSHITOMO
IPC分类号： H01J9/14
摘要： PROBLEM TO BE SOLVED: To provide a method for surface treatment of support frame for shadow mask, which can form an oxide film having the equal characteristic with a photographic film and which can eliminate the photographic film so as to simplify the work, in a support frame made of the stainless steel material. SOLUTION: An oxide film of Cr2 O3 is produced on the surface of a support frame 1 in annealing for improvement of the magnetic characteristic of a color cathode-ray tube. For example, in annealing for elimination of the distortion due to the working in pressing the support frame 1 and for lowering of the concentration of the contained carbon, the mixture gas of H2 +N2 , in which a small quantity of moisture is contained, is supplied into an annealing surface so as to produce the oxide film of Cr2 O3 on the surface of the support frame 1. This support frame 1, to which the surface treatment is performed, is welded to a shadow mask 2 and a spring 3 for assembling, and assembled as a shadow mask structure in a color cathode-ray tube. A color deflection error of the shadow mask 2 is thereby reduce so as to obtain the image of high quality.

4. 发明专利

JPH0822768A CLEANING METHOD FOR COLOR CATHODE-RAY TUBE PANEL 失效
公开(公告)号：JPH0822768A
公开(公告)日：1996-01-23
申请号：JP15570194
申请日：1994-07-07
申请人： HITACHI LTD , HITACHI CHIBA ELECTRON KK
发明人： ODAKA YOSHIYUKI , NISHIZAWA SHOKO , MIYAMA TOSHIKUNI , YOSHITAKE HIROAKI , MIYAGAWA ATSUSHI
IPC分类号： H01J9/38 , H01J9/227
摘要： PURPOSE:To restrain the occurrence of nonuniformity of cleaning of a color cathode-ray tube panel by performing acid or alkali cleaning after a black matrix fluorescent screen is first removed by a high pressure water spray or water flow. CONSTITUTION:A defective bulb of a black matrix-shaped color cathode-ray tube is inputted to a frit reprocess, and frit glass is treated by nitric acid, and a glass panel 1 is separated from a funnel. The panel 1 is downward fixed to a panel holder for a washer. Water is injected for 20 seconds under pressure of 10kg/cm from plural high pressure spray nozzles 23 arranged on the panel under side, and a fluorescent screen is completely removed from a panel inside surface. Next, similarly as usual, water cleaning is performed by an acid or alkali cleaning liquid and a bar nozzle. Therefore, nonuniformity of cleaning is hardly caused, and the concentration of acid or alkali to be used is diluted, and safety is improved, and the occurrence of a defective at panel reproducing time can be reduced.

5. 发明专利

JPH07226160A AUTOMATIC KIND DISCRIMINATING METHOD AND DEVICE 失效
公开(公告)号：JPH07226160A
公开(公告)日：1995-08-22
申请号：JP1510194
申请日：1994-02-09
申请人： HITACHI LTD , HITACHI CHIBA ELECTRON KK
发明人： TAKIZAWA MOTOMI , MIYAZAKI TSUTOMU
IPC分类号： H01J9/42 , H01J9/18 , H01J9/34
摘要： PURPOSE:To automate discrimination of a kind, and facilitate the introduction to a mass production line. CONSTITUTION:Two colors of multiform glasses 3A and 3B to discriminate a kind of an electron gun are respectively detected by fiber sensors 5A and 5B, and coloring matter analysis of three primary co.colors is performed on this detecting information by controllers 6A and 6B, and this coloring matter information is checked up with a color combination of kind information by a one-board microcomputer 7, and a kind of an electron gun 2 is discriminated. Thereby, a kind ckeckup in part assembling, inspecting and warehousing processes can be automated, and a problem of causing failure mixture is solved. Since a color of a detection object part is detected by the fiber sensors, cost is reduced, and a sensor part is downsized, and a color discriminating device can be easily introduced to a mass production line.

6. 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.

7. 发明专利

JPH09320472A ASSEMBLY ADJUSTING METHOD OF CATHODE-RAY TUBE 失效
公开(公告)号：JPH09320472A
公开(公告)日：1997-12-12
申请号：JP13619096
申请日：1996-05-30
申请人： HITACHI LTD , HITACHI CHIBA ELECTRON KK
发明人： AKIYAMA MASATOSHI , AKUTSU TOMOYUKI
IPC分类号： H01J9/44 , H04N17/04
摘要： PROBLEM TO BE SOLVED: To display the adjustment standard values on a monitor and keep the quality of properties of cathode-ray tubes constant by inputting a relation expression between a cathode-ray tube characteristics an fluctuation factors which affect the characteristics into a control system and inputting actual measured values of the factors at the time of adjustment. SOLUTION: Two points of a major axis indicating three o'clock and nine o'clock are used as adjustment standard points for a screen of a bulb 1. The different quantity y of electron beam to phosphor dots detected by a camera 7 for landing measurement and the bulb temperature x have a relation; y=x-25 in the case a monometal material is used for a spring material for a shadow mask. The data 6 is stored as a program in a control system 3. In the case the temperature measured by the temperature sensor 8 is 20 deg.C, y=20-25=-5μm. This result becomes a standard value of the landing property of the bulb 1 and displayed as a standard range 12 on a monitor 4. An adjusting operator so adjusts the position of a deflecting yoke as to keep the actual value 11a of the electron beam within the range 12.

8. 发明专利

JPH0935657A SHADOW MASK COLOR CATHODE RAY TUBE 失效
公开(公告)号：JPH0935657A
公开(公告)日：1997-02-07
申请号：JP18024695
申请日：1995-07-17
申请人： HITACHI LTD , HITACHI CHIBA ELECTRON KK
发明人： SAITO HOGEN , FUKUDA KENJI
IPC分类号： H01J29/07
摘要： PROBLEM TO BE SOLVED: To provide a shadow mask color cathode-ray tube equipped with stress absorbing holes which are transformed by the application of small shrinkage stress and the quantity of whose transformation corresponds to the shrinkage stress applied. SOLUTION: This is a shadow mask color cathode-ray tube which has a shadow mask 5 equipped with a curved main surface 13 and a skirt part 14 bent at roughly right angle to the main surface 13, and the main surface of which consists of a perforated region having many electron passage holes 15 and an unperforated region 17 not having holes, being provided in a band form at the periphery of the perforated region 16. Each of the longs-side region 20 and the short-side region 21 of the skirt part 14 is provided with plural slit- shaped or round stress absorbing holes 19, and the density of arranged plural stress absorbing holes 18 is changed so that it may becomes larger as it comes closer to the vicinity of the corner part 22 from roughly the center of the long- side region 20 or the short-side region 21.

9. 发明专利

JPH08293255A DEVICE FOR MEASURING HEIGHT OF Z POINT OF CATHODE-RAY TUBE 失效
公开(公告)号：JPH08293255A
公开(公告)日：1996-11-05
申请号：JP9649595
申请日：1995-04-21
申请人： HITACHI LTD , HITACHI CHIBA ELECTRON KK
发明人： OHASHI KUNIKAZU , KOSEKI JUNICHI , DAIMON TAKASHI
IPC分类号： H01J9/42
摘要： PURPOSE: To enable automatic measurement of various kinds of cathode-ray tubes by placing, on. an X-Y table, mounting-lug measuring parts and Z-point measuring parts provided at a fixed distance to each other, and measuring the height of a Z point through conversion of the difference in height between the Z point and a mounting lug for each kind. CONSTITUTION: Cathode-ray tubes 1A, 1B are placed on a panel support 7 and positioned by means of a roller 9, and then a Z-point measuring terminal 18 is moved to a predetermined position by means of an X-Y table 15. Next, a vertically moving plate 12 is raised by an air cylinder 11, and the heights of four fixed points of the tube 1 are measured by means of the terminal 18 to determine the kind of the tube. The plate 12 is then lowered, a mounting-lug measuring terminal 17 is set in the lug hole for the kind determined, and the plate 12 is raised again to measure the height of a lug. The difference between the heights measured by the terminals 17, 18 is converted by a conversion circuit to that for Z point and a mounting lug, and compared with a stored height difference for that kind to determine whether or not the tube is conforming. Therefore, the height of the Z point of the multiple-size tube 1 can be measured automatically.

10. 发明专利

JPH0721922A INSPECTION OF PANEL SURFACE CONDITION OF CATHODE-RAY TUBE 失效
公开(公告)号：JPH0721922A
公开(公告)日：1995-01-24
申请号：JP16441893
申请日：1993-07-02
申请人： HITACHI LTD , HITACHI CHIBA ELECTRON KK
发明人： FUJISHIMA TAKESHI
IPC分类号： H01J9/42 , C07D295/18 , H01J9/50
摘要： PURPOSE:To easily confirm any unpeeled remainder of a thin film. CONSTITUTION:A cathode-ray tube 1, for which a defective thin film formed on the surface of a panel 2 is peeled, is dipped in a liquid 7 having the same reflectance as that of the glass of the cathode-ray tube. The surface of the panel 2 is made to emit light so as to inspect any unpeeled remainder 3 of the thin film.

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