FR2406887A1 - CRT giving reduced distraction due to reflections - has screen with concave outer surface with radius of curvature selected according to viewing distance - Google Patents

CRT giving reduced distraction due to reflections - has screen with concave outer surface with radius of curvature selected according to viewing distance

Info

Publication number
FR2406887A1
FR2406887A1 FR7829714A FR7829714A FR2406887A1 FR 2406887 A1 FR2406887 A1 FR 2406887A1 FR 7829714 A FR7829714 A FR 7829714A FR 7829714 A FR7829714 A FR 7829714A FR 2406887 A1 FR2406887 A1 FR 2406887A1
Authority
FR
France
Prior art keywords
screen
reflections
radius
crt
concave outer
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
FR7829714A
Other languages
French (fr)
Other versions
FR2406887B1 (en
Inventor
Eiichi Miyazaki
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of FR2406887A1 publication Critical patent/FR2406887A1/en
Application granted granted Critical
Publication of FR2406887B1 publication Critical patent/FR2406887B1/fr
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
    • H01J29/86—Vessels; Containers; Vacuum locks
    • 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
    • H01J29/86—Vessels; Containers; Vacuum locks
    • H01J29/89—Optical or photographic arrangements structurally combined or co-operating with the vessel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/86—Vessels and containers
    • H01J2229/8613—Faceplates
    • H01J2229/8616—Faceplates characterised by shape
    • H01J2229/862—Parameterised shape, e.g. expression, relationship or equation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/89—Optical components associated with the vessel
    • H01J2229/8913—Anti-reflection, anti-glare, viewing angle and contrast improving treatments or devices

Landscapes

  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)

Abstract

The cathode ray tube has its screen provided with a concave outer surface to prevent the viewer's attention being distracted from the picture by reflections of external bright objects. The radius of curvature of the outer surface is determined by the degree of reflection exclusion required and bears a specified relationship to the viewer's distance from the screen, the screen's size and the shortest focal length of the human eye.
FR7829714A 1977-10-19 1978-10-18 CRT giving reduced distraction due to reflections - has screen with concave outer surface with radius of curvature selected according to viewing distance Granted FR2406887A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12611577A JPS6047696B2 (en) 1977-10-19 1977-10-19 picture tube

Publications (2)

Publication Number Publication Date
FR2406887A1 true FR2406887A1 (en) 1979-05-18
FR2406887B1 FR2406887B1 (en) 1981-05-29

Family

ID=14926997

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7829714A Granted FR2406887A1 (en) 1977-10-19 1978-10-18 CRT giving reduced distraction due to reflections - has screen with concave outer surface with radius of curvature selected according to viewing distance

Country Status (2)

Country Link
JP (1) JPS6047696B2 (en)
FR (1) FR2406887A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6373849U (en) * 1986-10-31 1988-05-17

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB405977A (en) * 1931-06-19 1934-02-16 Manfred Von Ardenne Improvements in and relating to cathode-ray tubes
GB453043A (en) * 1935-01-30 1936-09-03 Telefunken Gmbh Improvements in or relating to cathode ray tube television and like reproducer apparatus
FR856864A (en) * 1938-06-25 1940-08-13 Philips Nv Electric discharge tube for optical indication of voltages
FR1475718A (en) * 1966-01-06 1967-04-07 Philips Nv Shooting tubes for television

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB405977A (en) * 1931-06-19 1934-02-16 Manfred Von Ardenne Improvements in and relating to cathode-ray tubes
GB453043A (en) * 1935-01-30 1936-09-03 Telefunken Gmbh Improvements in or relating to cathode ray tube television and like reproducer apparatus
FR856864A (en) * 1938-06-25 1940-08-13 Philips Nv Electric discharge tube for optical indication of voltages
FR1475718A (en) * 1966-01-06 1967-04-07 Philips Nv Shooting tubes for television

Also Published As

Publication number Publication date
JPS6047696B2 (en) 1985-10-23
FR2406887B1 (en) 1981-05-29
JPS5459072A (en) 1979-05-12

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Legal Events

Date Code Title Description
ST Notification of lapse