AExE02 · Chapter 2Theory of Computation & Graphics🏛️ Past Licensure QuestionID: 588f6ecd
The shadow-mask technique is utilized in:
The shadow-mask technique is utilized in:
Multiple Choice Options
- A
Liquid Crystal Displays (LCD)
- B✓ Correct Option
Color Cathode Ray Tube (CRT) monitors
- C
Organic Light Emitting Diode (OLED) screens
- D
Electronic Ink (E-ink) displays
Detailed Technical Solution & Explanation
In color CRT monitors, a shadow mask is a thin metal screen with tiny perforations placed directly behind the phosphor screen. It precisely aligns electron beams from the red, green, and blue electron guns so each beam strikes only its corresponding phosphor dot.
Option Analysis:
•
Option A (Liquid Crystal Displays (LCD)): Uses liquid crystals modulating polarized backlight.
•
Option B (monitors): Correct. The shadow mask ensures color separation for CRT electron beams.
•
Option C (Organic Light Emitting Diode (OLED) s...): Uses emissive organic electroluminescent diodes.
•
Option D (Electronic Ink (E-ink) displays): Uses electrophoretic microcapsules.
Reference: Demo2 · Set 1NEC Licensure Syllabus