JPS57115749A - Color picture tube - Google Patents

Color picture tube

Info

Publication number
JPS57115749A
JPS57115749A JP236681A JP236681A JPS57115749A JP S57115749 A JPS57115749 A JP S57115749A JP 236681 A JP236681 A JP 236681A JP 236681 A JP236681 A JP 236681A JP S57115749 A JPS57115749 A JP S57115749A
Authority
JP
Japan
Prior art keywords
layer
layers
light absorbing
reflected lights
black light
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.)
Pending
Application number
JP236681A
Other languages
Japanese (ja)
Inventor
Yasuo Iwasaki
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP236681A priority Critical patent/JPS57115749A/en
Publication of JPS57115749A publication Critical patent/JPS57115749A/en
Pending 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
    • H01J29/30—Luminescent screens with luminescent material discontinuously arranged, e.g. in dots, in lines
    • H01J29/32—Luminescent screens with luminescent material discontinuously arranged, e.g. in dots, in lines with adjacent dots or lines of different luminescent material, e.g. for colour television
    • H01J29/327—Black matrix materials
    • 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 make decreased amount of adventitious light to be reflected at the inner surface of a glass panel, and increase the contrast performance of a fluorescent surface by providing mixture layers, which are made of a black light absorbing layer and a transparent conductive layer with a given refractive index, between a phosphor layer and black light absorbing layers. CONSTITUTION:A transparent dielectric layer 6 is provided between a phosphor layer 3 and the inner surface of a glass panel 1 on which black light absorbing layers 2 are formed. Parts of the layer 6 which are located over the layers 2 are changed into mixture layers 7 by mixing with the layers 2. The refractive index of the layer 6 is adjusted to be near that of the panel glass as far as possible. Owing to the above constitution, when an adventitious light L becomes incident upon the mixture layer 7, inner surface reflected lights R2 are greatly decreased, although outer surface reflected lights R1 and mass reflected lights R3 are not changed at all. Consequently, the quality of the picture of a picture tube can be greatly increased.
JP236681A 1981-01-07 1981-01-07 Color picture tube Pending JPS57115749A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP236681A JPS57115749A (en) 1981-01-07 1981-01-07 Color picture tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP236681A JPS57115749A (en) 1981-01-07 1981-01-07 Color picture tube

Publications (1)

Publication Number Publication Date
JPS57115749A true JPS57115749A (en) 1982-07-19

Family

ID=11527255

Family Applications (1)

Application Number Title Priority Date Filing Date
JP236681A Pending JPS57115749A (en) 1981-01-07 1981-01-07 Color picture tube

Country Status (1)

Country Link
JP (1) JPS57115749A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986000467A1 (en) * 1984-06-28 1986-01-16 Sony Corporation Cathode ray tube
EP0168790A2 (en) * 1984-07-13 1986-01-22 Okuno Chemical Industries Co., Ltd. Display device
US5081394A (en) * 1987-09-01 1992-01-14 Hitachi, Ltd. Black matrix color picture tube

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986000467A1 (en) * 1984-06-28 1986-01-16 Sony Corporation Cathode ray tube
EP0168790A2 (en) * 1984-07-13 1986-01-22 Okuno Chemical Industries Co., Ltd. Display device
US5081394A (en) * 1987-09-01 1992-01-14 Hitachi, Ltd. Black matrix color picture tube

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