JPS551059A - Electromagnetic focus cathode-ray tube - Google Patents

Electromagnetic focus cathode-ray tube

Info

Publication number
JPS551059A
JPS551059A JP11469378A JP11469378A JPS551059A JP S551059 A JPS551059 A JP S551059A JP 11469378 A JP11469378 A JP 11469378A JP 11469378 A JP11469378 A JP 11469378A JP S551059 A JPS551059 A JP S551059A
Authority
JP
Japan
Prior art keywords
axle
right angle
magnetic pieces
small
small holes
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP11469378A
Other languages
Japanese (ja)
Other versions
JPS6149783B2 (en
Inventor
Kyohei Fukuda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE2826858A external-priority patent/DE2826858C2/en
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Publication of JPS551059A publication Critical patent/JPS551059A/en
Publication of JPS6149783B2 publication Critical patent/JPS6149783B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To reduce the deterioration of resolution due to the elongation of beam spot by making the diameters of each small hole provided to magnetic pieces greater in the right angle direction to the arranged direction of holes.
CONSTITUTION: The small holes 11a to 11c provided in the magnetic pieces 6 and 7 are formed in an oval shape whose X direction is short axle and also Y direction right-angled to the X-axle is long axle. The diameter of the right angle direction (X- axle) is made larger than that of the other to an adequate size, and thereby much the same magnetic field intensity can be obtained in both the arranged direction of small holes and the right angle direction to the arranged direction in the oval small cylindrical zone formed by the small holes 11a to 11c of the magnetic pieces 6 and 7, making the shape of electron beam reaching the fluorescent screen true cycle form. Thus, the deterioration of resolution due to the elongation of beam spot can be reduced.
COPYRIGHT: (C)1980,JPO&Japio
JP11469378A 1978-06-19 1978-09-20 Electromagnetic focus cathode-ray tube Granted JPS551059A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2826858A DE2826858C2 (en) 1977-06-20 1978-06-19 Magnetic focusing system of a multi-beam cathode ray picture tube

Publications (2)

Publication Number Publication Date
JPS551059A true JPS551059A (en) 1980-01-07
JPS6149783B2 JPS6149783B2 (en) 1986-10-31

Family

ID=6042181

Family Applications (2)

Application Number Title Priority Date Filing Date
JP11469478A Granted JPS551060A (en) 1978-06-19 1978-09-20 Electromagnetic focus cathode-ray tube
JP11469378A Granted JPS551059A (en) 1978-06-19 1978-09-20 Electromagnetic focus cathode-ray tube

Family Applications Before (1)

Application Number Title Priority Date Filing Date
JP11469478A Granted JPS551060A (en) 1978-06-19 1978-09-20 Electromagnetic focus cathode-ray tube

Country Status (1)

Country Link
JP (2) JPS551060A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4460844A (en) * 1980-12-15 1984-07-17 Hitachi, Ltd. Magnetic focusing, three in-line gun type color picture tube
US4490644A (en) * 1981-09-02 1984-12-25 Tokyo Shibaura Denki Kobashiki Kaisha Magnetic focusing type cathode ray tube

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60156483A (en) * 1984-01-25 1985-08-16 株式会社ソフイア Ball hitting apparatus of pinball game machine
JPS61137580A (en) * 1984-12-10 1986-06-25 桂　治 Game machine
JP2576855B2 (en) * 1985-12-13 1997-01-29 株式会社 大一商会 Pachinko machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4460844A (en) * 1980-12-15 1984-07-17 Hitachi, Ltd. Magnetic focusing, three in-line gun type color picture tube
US4490644A (en) * 1981-09-02 1984-12-25 Tokyo Shibaura Denki Kobashiki Kaisha Magnetic focusing type cathode ray tube

Also Published As

Publication number Publication date
JPS6149783B2 (en) 1986-10-31
JPS551060A (en) 1980-01-07
JPS6149784B2 (en) 1986-10-31

Similar Documents

Publication Publication Date Title
JPS5475215A (en) Deflecting unit
JPS551059A (en) Electromagnetic focus cathode-ray tube
JPS5559637A (en) Magnetic focus cathode ray tube
JPS5335366A (en) Color picture tube
JPS5413249A (en) Cathode ray tube
JPS545374A (en) Electronic gun
JPS54133070A (en) Constituent for electron gun
JPS52137260A (en) Color cathode ray tube unit
JPS54161232A (en) Cathode-ray tube and its manufacture
JPS5613644A (en) Color cathode-ray tube
JPS54561A (en) Cathode ray tube of projection type
JPS57132645A (en) Cathode-ray tube
JPS52113153A (en) Cathode ray tube electronic gun
JPS52155960A (en) Electron gun for cathode ray tube
JPS5543758A (en) Cathode ray tube electron gun
JPS5448152A (en) Straight-going beam type klystron
JPS5479556A (en) Electron gun for chthode-ray tube
JPS5318916A (en) Cathode-ray tube
JPS5593640A (en) Electron beam focussing device
JPS54134971A (en) In-line type electron gun structure
JPS55115242A (en) Projection type braun tube
JPS57151152A (en) Crt
JPS5588250A (en) Electron beam convergence device
JPS5376737A (en) Electron gun structure
JPS5463665A (en) Image tube