Cathode Ray Tube
E772210
A cathode ray tube is a vacuum tube technology that uses electron beams to create images on a phosphorescent screen, historically used in televisions, oscilloscopes, and computer monitors.
All labels observed (5)
| Label | Occurrences |
|---|---|
| Crookes tube | 2 |
| Braun tube (early cathode-ray tube) | 1 |
| Braun tube oscilloscope | 1 |
| Cathode Ray Tube canonical | 1 |
| cathode-ray tube | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T9000799 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Cathode Ray Tube Context triple: [CRT, fullName, Cathode Ray Tube]
-
A.
Trinitron
Trinitron is Sony’s line of high-quality aperture grille cathode-ray tube (CRT) displays, renowned for their sharp image, bright colors, and widespread use in televisions and computer monitors from the late 1960s onward.
-
B.
NEC aperture grille CRTs
NEC aperture grille CRTs were high-quality cathode-ray tube computer and video displays that used an aperture grille design similar to Sony’s Trinitron to deliver sharp images and vibrant color.
-
C.
The TV Set
The TV Set is a 2006 satirical comedy film about the compromises and absurdities of developing a television pilot within the Hollywood network system.
-
D.
Baird television camera
The Baird television camera was an early mechanical television imaging device developed by Scottish inventor John Logie Baird, used to capture moving images for some of the first experimental TV broadcasts.
-
E.
VDU
VDU is the Lithuanian abbreviation for Vytautas Magnus University, a prominent public university in Kaunas, Lithuania.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Cathode Ray Tube Target entity description: A cathode ray tube is a vacuum tube technology that uses electron beams to create images on a phosphorescent screen, historically used in televisions, oscilloscopes, and computer monitors.
-
A.
Trinitron
Trinitron is Sony’s line of high-quality aperture grille cathode-ray tube (CRT) displays, renowned for their sharp image, bright colors, and widespread use in televisions and computer monitors from the late 1960s onward.
-
B.
NEC aperture grille CRTs
NEC aperture grille CRTs were high-quality cathode-ray tube computer and video displays that used an aperture grille design similar to Sony’s Trinitron to deliver sharp images and vibrant color.
-
C.
The TV Set
The TV Set is a 2006 satirical comedy film about the compromises and absurdities of developing a television pilot within the Hollywood network system.
-
D.
Baird television camera
The Baird television camera was an early mechanical television imaging device developed by Scottish inventor John Logie Baird, used to capture moving images for some of the first experimental TV broadcasts.
-
E.
VDU
VDU is the Lithuanian abbreviation for Vytautas Magnus University, a prominent public university in Kaunas, Lithuania.
- F. None of above. chosen
Statements (60)
| Predicate | Object |
|---|---|
| instanceOf |
display technology
ⓘ
electron beam device ⓘ vacuum tube ⓘ |
| appliesPhysicalPrinciple |
electromagnetic deflection
ⓘ
electrostatic deflection ⓘ fluorescence ⓘ phosphorescence ⓘ thermionic emission ⓘ |
| contains |
electron-emissive materials
ⓘ
lead glass ⓘ phosphor compounds ⓘ |
| emits | visible light ⓘ |
| hasAlternativeName | CRT ⓘ |
| hasComponent |
anode
ⓘ
aperture grille ⓘ cathode ⓘ control grid ⓘ deflection coils ⓘ electron beam focusing system ⓘ electron gun ⓘ glass envelope ⓘ phosphor-coated screen ⓘ shadow mask ⓘ |
| hasProperty |
bulky form factor
ⓘ
high power consumption ⓘ potential X-ray emission ⓘ significant depth ⓘ |
| hasType |
aperture grille CRT
ⓘ
color CRT ⓘ
linked to:
NEC aperture grille CRTs
delta-gun CRT ⓘ in-line gun CRT ⓘ monochrome CRT ⓘ oscilloscope CRT ⓘ shadow mask CRT ⓘ storage CRT ⓘ vector CRT ⓘ |
| isRegulatedFor |
hazardous waste disposal
ⓘ
radiation safety ⓘ |
| requires |
high voltage anode supply
ⓘ
vacuum inside tube ⓘ |
| usedIn |
air traffic control displays
ⓘ
broadcast studio monitors ⓘ computer monitors ⓘ medical imaging displays ⓘ oscilloscopes ⓘ radar displays ⓘ television receivers ⓘ vector displays ⓘ video arcade machines ⓘ |
| uses |
deflection system
ⓘ
electron beam ⓘ electron gun ⓘ high voltage supply ⓘ phosphorescent screen ⓘ vacuum envelope ⓘ |
| wasDominantDisplayTechnologyDuring | 20th century ⓘ |
| wasLargelySupersededBy |
LCD
ⓘ
LED display ⓘ
linked to:
LED
OLED display ⓘ plasma display ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Cathode Ray Tube Description of subject: A cathode ray tube is a vacuum tube technology that uses electron beams to create images on a phosphorescent screen, historically used in televisions, oscilloscopes, and computer monitors.
Referenced by (6)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Cathode Ray Tube
linked to: Cathode Ray Tube
linked to: Cathode Ray Tube
linked to: Cathode Ray Tube
linked to: Cathode Ray Tube