GB1360835A - Creación de Inventos y Patentes con Inteligencia Artificial

GB1360835A – Cathodochromic display tube
– Google Patents

GB1360835A – Cathodochromic display tube
– Google Patents
Cathodochromic display tube

Info

Publication number
GB1360835A

GB1360835A
GB3223971A
GB3223971A
GB1360835A
GB 1360835 A
GB1360835 A
GB 1360835A
GB 3223971 A
GB3223971 A
GB 3223971A
GB 3223971 A
GB3223971 A
GB 3223971A
GB 1360835 A
GB1360835 A
GB 1360835A
Authority
GB
United Kingdom
Prior art keywords
heating
optically
component
curve
sensitivity
Prior art date
1970-10-08
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.)

Expired

Application number
GB3223971A
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.)

RCA Corp

Original Assignee
RCA 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.)
1970-10-08
Filing date
1971-07-08
Publication date
1974-07-24

1971-07-08
Application filed by RCA Corp
filed
Critical
RCA Corp

1974-07-24
Publication of GB1360835A
publication
Critical
patent/GB1360835A/en

Status
Expired
legal-status
Critical
Current

Links

Espacenet

Global Dossier

Discuss

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

H01J29/14—Screens on or from which an image or pattern is formed, picked up, converted or stored acting by discoloration, e.g. halide screen

Abstract

1360835 Uses of photochromism RCA CORPORATION 8 July 1971 [8 Oct 1970 (2)] 32239/71 Heading C4S [Also in Division H1] A cathodochromic display tube has a target of cathodochromic material 10 colourable by electron impingement with a coloration having an optically reversible component and an optically irreversible component, wherein the target is exposed to an electron beam which is modulated and simultaneously scanned to provide a visible coloration pattern means being included to suppress, at least a portion of the optically reversible component only. Suppression may be by radiation of erasing wavelength, by heating to below the total erase temperature, e.g. by infra-red radiation from an external or internal source or electrical resistance heating such as a thin metal or indium oxide film 20 on mica sheet 22 and connected to heating circuit 15 or by electron bombardment (e.g. the electron beam with or without additional heating). Gun electrode 30 may be connected to a conductive wall coating on the tube envelope 14. The cathodochromic material may be sodalite (e.g. Na 8 Al 6 Si 6 O 24 Cl 2 or with Br-, I-, OH- and SO2- 4 substitutions) which is not normally cathodromic until heat reduced in a hydrogen atmosphere. Br and Cl substitutions produce absorption bands of 5550Š and 5250A respectively. The optically reversible coloration usually saturation at contrast ratios of 2 to 3 to 1 (Curve A, Fig. 2, not shown) while the irreversible components in some bromine and chlorine sodalites continues to rise (Curve B). The latter component may be erased at 200 to 300‹ C. and Br sodalite is preferred, having an induced absorption spectrum close to the eye sensitivity curve. 100 to 150‹ C. is the temperature for most sodalite materials at which no optically reversible component is present. Fig. 4 (not shown) displays exposure required for a given contrast ratio and beam current with screen voltage as variable. Sensitivity to beam current is indicated as a heating effect, the sensitivity of the optically reversible mode decreasing with increasing current, while thermal erase sensitivity first increases and then decreases. In Fig. 5 (not shown), heating to higher temperatures than curve (2), reduces contrast ratio as in curves (3) and (4). Poor fidelity indicated by the non linear plot of Fig. 3 (not shown). The γ may be adjusted by circuitry in some cases, or by suppressing the optically reversible component with heat. In a 1/30 sec. TV scan the image from a 100 Áa beam is heated to 300‹ C. between seams to erase, 2 sec being required for erasure. Prior to further writing, cooling may be to an intermediate partial erase temperature.

GB3223971A
1970-10-08
1971-07-08
Cathodochromic display tube

Expired

GB1360835A
(en)

Applications Claiming Priority (2)

Application Number
Priority Date
Filing Date
Title

US7903770A

1970-10-08
1970-10-08

US7903670A

1970-10-08
1970-10-08

Publications (1)

Publication Number
Publication Date

GB1360835A
true

GB1360835A
(en)

1974-07-24

Family
ID=26761564
Family Applications (1)

Application Number
Title
Priority Date
Filing Date

GB3223971A
Expired

GB1360835A
(en)

1970-10-08
1971-07-08
Cathodochromic display tube

Country Status (4)

Country
Link

US
(2)

US3706845A
(en)

JP
(1)

JPS5120127B1
(en)

DE
(1)

DE2133923A1
(en)

GB
(1)

GB1360835A
(en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

US4035525A
(en)

1974-04-01
1977-07-12
Massachusetts Institute Of Technology
Cathode ray tube employing faceplate-deposited cathodochromic material and electron beam erase

US3968394A
(en)

1974-04-01
1976-07-06
Massachusetts Institute Of Technology
Cathode ray tube employing faceplate-deposited cathodochromic material and electron beam erase

US4545641A
(en)

1983-05-10
1985-10-08
Ltv Aerospace And Defense
High speed erasing and rebiasing of thermoptic thin films in the medium and long-wave infrared

JPH1021843A
(en)

1996-06-28
1998-01-23
Nec Kansai Ltd
Color cathode-ray tube

Family Cites Families (8)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

US2836753A
(en)

1942-09-14
1958-05-27
Nat Union Electric Corp
Dark trace cathode-ray tubes and screens therefor

US2755407A
(en)

1955-03-03
1956-07-17
Norman F Fyler
Dark trace cathode ray tube

US3148281A
(en)

1961-02-28
1964-09-08
Litton Prec Products Inc
Cathode ray storage tube using a dark trace layer and a phosphor layer

US3253497A
(en)

1961-10-30
1966-05-31
Polacoat Inc
Information storage device

US3252374A
(en)

1962-02-15
1966-05-24
Corning Glass Works
Means for controlling the light transmission of a phototropic glass structure

US3365577A
(en)

1964-07-01
1968-01-23
Teeg Research Inc
Infrared imaging device utilizing a vanadium dioxide film

US3401262A
(en)

1965-06-29
1968-09-10
Westinghouse Electric Corp
Radiation sensitive display system utilizing a cholesteric liquid crystalline phase material

US3438022A
(en)

1966-07-07
1969-04-08
Teeg Research Inc
Thermochromic display device

1970

1970-10-08
US
US79037A
patent/US3706845A/en
not_active
Expired – Lifetime

1970-10-08
US
US79036A
patent/US3700804A/en
not_active
Expired – Lifetime

1971

1971-07-07
DE
DE19712133923
patent/DE2133923A1/en
active
Pending

1971-07-08
GB
GB3223971A
patent/GB1360835A/en
not_active
Expired

1971-07-08
JP
JP46050646A
patent/JPS5120127B1/ja
active
Pending

Also Published As

Publication number
Publication date

US3700804A
(en)

1972-10-24

JPS5120127B1
(en)

1976-06-23

US3706845A
(en)

1972-12-19

DE2133923A1
(en)

1972-04-13

Información de contacto