CTS Display Technologies and Video Systems 1 — Questions and Answers
Question 1: What is the native resolution of a 4K UHD display?
- 1920 x 1080 pixels
- 3840 x 2160 pixels (Correct answer)
- 2560 x 1440 pixels
- 4096 x 2160 pixels
Correct answer: 3840 x 2160 pixels
4K UHD (Ultra High Definition) has a native resolution of 3840 x 2160 pixels, which is four times the pixel count of 1080p Full HD.
Question 2: What does EDID stand for in display technology?
- Enhanced Digital Interface Data
- Extended Display Identification Data (Correct answer)
- External Device Input Description
- Electronic Display Integration Driver
Correct answer: Extended Display Identification Data
EDID (Extended Display Identification Data) is a metadata standard that a display communicates to a source device to describe its capabilities, including supported resolutions and refresh rates.
Question 3: What is the throw ratio of a projector?
- The ratio of image brightness to ambient light
- The ratio of projection distance to image width (Correct answer)
- The ratio of contrast to lumens output
- The ratio of lens focal length to screen gain
Correct answer: The ratio of projection distance to image width
Throw ratio is calculated by dividing the projection distance by the image width; a lower throw ratio means the projector can produce a larger image from a shorter distance.
Question 4: Which display technology uses self-emitting pixels that do not require a separate backlight?
- LCD
- DLP
- OLED (Correct answer)
- LCoS
Correct answer: OLED
OLED (Organic Light-Emitting Diode) displays use organic compounds that emit light individually per pixel, eliminating the need for a backlight and enabling true blacks.
Question 5: What is the standard aspect ratio for a widescreen HDTV display?
- 4:3
- 16:9 (Correct answer)
- 16:10
- 21:9
Correct answer: 16:9
16:9 is the standard aspect ratio for HDTV and modern consumer displays, adopted as the broadcast standard for high-definition television.
Question 6: What unit is used to measure the light output of a projector?
- Candela
- Foot-candles
- ANSI lumens (Correct answer)
- Lux
Correct answer: ANSI lumens
ANSI lumens is the standardized measurement used to rate the light output of projectors, based on a nine-point average brightness measurement across the projected image.
Question 7: What is the purpose of High Dynamic Range (HDR) in display technology?
- To increase the display resolution beyond 4K
- To extend the range between the brightest and darkest parts of an image (Correct answer)
- To reduce power consumption in LED backlights
- To synchronize frame rates between source and display
Correct answer: To extend the range between the brightest and darkest parts of an image
HDR (High Dynamic Range) extends the luminance range a display can show, producing brighter highlights and deeper shadows simultaneously for a more realistic image.
CTS Display Technologies and Video Systems 1
What is the native resolution of a 4K UHD display?