cathode-ray tube
Học thuậtThân thiện
Definition
Noun: A cathode-ray tube is a specialized vacuum tube in which a heated cathode emits a stream of electrons. This electron beam is accelerated and focused by a high-voltage anode, then directed to strike a phosphorescent screen, creating a visible spot of light. The beam's position can be controlled to form images.
Usage
The term cathode-ray tube is used to describe the core display technology in older televisions, computer monitors, radar screens, and oscilloscopes. * The scientist observed the signal pattern on the cathode-ray tube of the oscilloscope. * Before flat-panel displays, most televisions contained a large, heavy cathode-ray tube.
Advanced Usage
- Technical Context: In electronics and engineering, the cathode-ray tube is often discussed in terms of its components: the electron gun, deflection system, and phosphor screen.
- The design focused on improving the deflection coils within the cathode-ray tube.
- Historical/Comparative Context: The term is frequently used to contrast older display technology with modern alternatives like LCD or OLED.
- The museum exhibit showed the evolution from the cathode-ray tube to the ultra-thin display.
Variants and Related Words
- CRT: A common initialism for cathode-ray tube.
- CRT monitors are now largely obsolete.
- Cathode Ray: Refers to the stream of electrons emitted from the cathode within the tube.
- The experiment demonstrated the properties of a cathode ray.
Synonyms
- Picture Tube (specifically for television sets)
- Display Tube
- Braun Tube (historical term, chiefly British English)
Related Phrases
- CRT Display: A display device that uses a cathode-ray tube.
- The laboratory equipment still used a reliable CRT display.
- CRT Technology: Refers to the broader technological principles and applications.
- CRT technology dominated the display market for decades.
Noun
- a vacuum tube in which a hot cathode emits a beam of electrons that pass through a high voltage anode and are focused or deflected before hitting a phosphorescent screen