220-801 · Question #399
Which of the following display types uses a charged gas method of illumination?
The correct answer is D. Plasma. Plasma displays work by applying voltage to cells filled with a noble gas mixture, causing the gas to ionize into plasma and emit ultraviolet light that excites phosphors to produce visible color.
Question
Which of the following display types uses a charged gas method of illumination?
Options
- AOLED
- BCRT
- CLED LCD
- DPlasma
How the community answered
(22 responses)- A5% (1)
- B5% (1)
- D91% (20)
Why each option
Plasma displays work by applying voltage to cells filled with a noble gas mixture, causing the gas to ionize into plasma and emit ultraviolet light that excites phosphors to produce visible color.
OLED (Organic Light-Emitting Diode) uses organic compounds that emit light when electric current is applied, not a charged gas process.
CRT (Cathode Ray Tube) uses an electron beam fired at a phosphor-coated screen, not charged gas illumination.
LED LCD uses a liquid crystal matrix with an LED backlight to block or pass light, not a gas-based method.
Plasma display panels (PDPs) use thousands of tiny cells containing a mixture of noble gases (xenon and neon). When voltage is applied, the gas ionizes into plasma state, which emits UV light that in turn excites red, green, and blue phosphors to produce the visible image - a charged gas method of illumination.
Concept tested: Display technology types and their illumination methods
Source: https://www.comptia.org/certifications/a
Topics
Community Discussion
No community discussion yet for this question.