Electron gun for color cathode ray tube

(19)

(11)

EP 1 294 009 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	06.05.2004 Bulletin 2004/19

(43)	Date of publication A2:
	19.03.2003 Bulletin 2003/12

(21)	Application number: 02254610.5

(22)	Date of filing: 01.07.2002

(51)	International Patent Classification (IPC)⁷: H01J 29/50

(84)	Designated Contracting States:
	AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR
	Designated Extension States:
	AL LT LV MK RO SI

(30)

Priority:

14.09.2001 KR 2001056933

(71)	Applicant: LG Philips Displays Korea Co., Ltd.
	Kumi-shi, Kyongsangbuk-do (KR)

(72)	Inventor:
	Kim, Youn Jin, Migwang Apt. 101-413 Gyeongsangbuk-do (KR)

(74)	Representative: McLeish, Nicholas Alistair Maxwell et al
	Boult Wade Tennant Verulam Gardens 70 Gray's Inn Road London WC1X 8BT London WC1X 8BT (GB)

(54)	Electron gun for color cathode ray tube

(57) The present invention discloses an electron gun for a color cathode ray tube. In order to efficiently penetrate a speed modulation magnetic field of a velocity modulation coil, at least two focus electrodes of main electrodes receiving a fixed focus voltage are arranged in a row in the electron gun. When a sum of lengths of the focus electrodes is 'L' and a sum of intervals of the electrodes is 'g', '(g×100)/L = 5∼30(%)' is satisfied.

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