JPS5676144A - Shadow mask type color picture tube - Google Patents

Shadow mask type color picture tube

Info

Publication number
JPS5676144A
JPS5676144A JP15208379A JP15208379A JPS5676144A JP S5676144 A JPS5676144 A JP S5676144A JP 15208379 A JP15208379 A JP 15208379A JP 15208379 A JP15208379 A JP 15208379A JP S5676144 A JPS5676144 A JP S5676144A
Authority
JP
Japan
Prior art keywords
slot
crosspieces
shadow mask
inter
picture tube
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
JP15208379A
Other languages
Japanese (ja)
Other versions
JPS6238821B2 (en
Inventor
Ryoji Hirai
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
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP15208379A priority Critical patent/JPS5676144A/en
Publication of JPS5676144A publication Critical patent/JPS5676144A/en
Publication of JPS6238821B2 publication Critical patent/JPS6238821B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/06—Screens for shielding; Masks interposed in the electron stream
    • H01J29/07—Shadow masks for colour television tubes
    • H01J29/076—Shadow masks for colour television tubes characterised by the shape or distribution of beam-passing apertures

Landscapes

  • Electrodes For Cathode-Ray Tubes (AREA)

Abstract

PURPOSE:To reduce the production of Moire pattern by arranging inter slot crosspieces alternately with a predetermined interval and two time of said interval while making the same kind of crosspieces arranged horizontally in parallel to be specific times of predetermined interval sequentially. CONSTITUTION:Assuming the inter slot crosspiece in the slot row of a shadow mask to be Pv/Pl=1.25 (Pl: Vertical distance between the scanning lines), the inter slot crosspieces are arranged alternately with intervals of Pv and 2Pv. While same kind of crosspieces (such as comes between long slot and short slot) in slot rows arranged horizontally in parallel are arranged sequentially to be 1/2, 3/2, 1/2, 3/2, ... of Pv in falling or rising order. Consequently a slot type shadow mask where Moire pattern is reduced while having high permeability and the shaping of curvature can be performed without problem can be obtained.
JP15208379A 1979-11-26 1979-11-26 Shadow mask type color picture tube Granted JPS5676144A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15208379A JPS5676144A (en) 1979-11-26 1979-11-26 Shadow mask type color picture tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15208379A JPS5676144A (en) 1979-11-26 1979-11-26 Shadow mask type color picture tube

Publications (2)

Publication Number Publication Date
JPS5676144A true JPS5676144A (en) 1981-06-23
JPS6238821B2 JPS6238821B2 (en) 1987-08-19

Family

ID=15532673

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15208379A Granted JPS5676144A (en) 1979-11-26 1979-11-26 Shadow mask type color picture tube

Country Status (1)

Country Link
JP (1) JPS5676144A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03291833A (en) * 1990-04-09 1991-12-24 Samsung Electron Devices Co Ltd Shadow mask
KR20010081586A (en) * 2000-02-16 2001-08-29 구자홍 Shadow-Mask for a color picture tube
US7224112B2 (en) 2003-08-05 2007-05-29 Matsushita Electric Industrial Co., Ltd. Color cathode-ray tube

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03291833A (en) * 1990-04-09 1991-12-24 Samsung Electron Devices Co Ltd Shadow mask
KR20010081586A (en) * 2000-02-16 2001-08-29 구자홍 Shadow-Mask for a color picture tube
US7224112B2 (en) 2003-08-05 2007-05-29 Matsushita Electric Industrial Co., Ltd. Color cathode-ray tube

Also Published As

Publication number Publication date
JPS6238821B2 (en) 1987-08-19

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