JPS5638741A - Color picture tube - Google Patents

Color picture tube

Info

Publication number
JPS5638741A
JPS5638741A JP11287579A JP11287579A JPS5638741A JP S5638741 A JPS5638741 A JP S5638741A JP 11287579 A JP11287579 A JP 11287579A JP 11287579 A JP11287579 A JP 11287579A JP S5638741 A JPS5638741 A JP S5638741A
Authority
JP
Japan
Prior art keywords
light
fluorescent
material layers
fluorescent material
surroundings
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
JP11287579A
Other languages
Japanese (ja)
Other versions
JPS6313300B2 (en
Inventor
Shoko Nishizawa
Yoshifumi Tomita
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 JP11287579A priority Critical patent/JPS5638741A/en
Publication of JPS5638741A publication Critical patent/JPS5638741A/en
Publication of JPS6313300B2 publication Critical patent/JPS6313300B2/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
    • H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
    • H01J29/18—Luminescent screens
    • H01J29/28—Luminescent screens with protective, conductive or reflective layers

Abstract

PURPOSE:To obtain a picture quality having a uniformity of contrast and brightness despite an intensity of light, by enveloping the surroundings of fluorescent luminous bodies with a material that changes its permeability of light according to the intensity of light. CONSTITUTION:On each of the surroundings of fluorescent material layers 3g, 3b, 3r, photochromic layers 2 are coated. When the emission of light of the fluorescent material layers 3g, 3b, 3r and outdoor daylight are intensified, the permeability of light of the photochromic layer 2 decreases to lower the reflection factor of a fluorescent screen. While the emission of light of the fluorescent material layers 3g, 3b, 3r and outdoor daylight are weakened, the reverse phenomenon to the above is caused. Accordingly, the change of a picture quality that widely changes according to the change of a condition for the picture to be seen can be decreased.
JP11287579A 1979-09-05 1979-09-05 Color picture tube Granted JPS5638741A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11287579A JPS5638741A (en) 1979-09-05 1979-09-05 Color picture tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11287579A JPS5638741A (en) 1979-09-05 1979-09-05 Color picture tube

Publications (2)

Publication Number Publication Date
JPS5638741A true JPS5638741A (en) 1981-04-14
JPS6313300B2 JPS6313300B2 (en) 1988-03-24

Family

ID=14597710

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11287579A Granted JPS5638741A (en) 1979-09-05 1979-09-05 Color picture tube

Country Status (1)

Country Link
JP (1) JPS5638741A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5045750A (en) * 1989-07-27 1991-09-03 Kabushiki Kaisha Toshiba Color picture tube having a phosphor screen with a semitransparent black light absorption

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5045750A (en) * 1989-07-27 1991-09-03 Kabushiki Kaisha Toshiba Color picture tube having a phosphor screen with a semitransparent black light absorption

Also Published As

Publication number Publication date
JPS6313300B2 (en) 1988-03-24

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