HDR HDR Display Technology & Hardware 2 — Questions and Answers
Question 1: What is the black level requirement for a DisplayHDR True Black 400 certified display?
- 0.001 cd/m²
- 0.0005 cd/m² (Correct answer)
- 0.005 cd/m²
- 0.0001 cd/m²
Correct answer: 0.0005 cd/m²
DisplayHDR True Black 400 requires a maximum black level of 0.0005 cd/m², achievable only by self-emissive display technologies like OLED.
Question 2: Which of the following best describes 'blooming' as a display artifact in HDR LCD screens?
- Excessive color saturation around bright objects
- Light spillover from bright areas into adjacent dark areas (Correct answer)
- Flickering in dark scenes due to backlight modulation
- Color banding in gradient transitions
Correct answer: Light spillover from bright areas into adjacent dark areas
Blooming is a halo-like artifact where backlight dimming zones bleed light into neighboring dark areas, reducing perceived contrast in HDR content.
Question 3: What color gamut does Ultra HD Premium certification require a television to cover at minimum?
- 90% of DCI-P3 (Correct answer)
- 90% of Rec. 2020
- 90% of sRGB
- 99% of DCI-P3
Correct answer: 90% of DCI-P3
Ultra HD Premium requires displays to cover at least 90% of the DCI-P3 color space, ensuring wide color gamut support for HDR content.
Question 4: In HDR display hardware, what is the purpose of an 'eotf' (Electro-Optical Transfer Function)?
- Converts digital signal values to screen luminance output (Correct answer)
- Compresses HDR metadata for storage
- Measures panel response time
- Calibrates color gamut coverage
Correct answer: Converts digital signal values to screen luminance output
The EOTF defines how digital code values in the signal are mapped to actual light output (luminance) on the display screen.
Question 5: Which technology allows OLED displays to boost peak brightness on small highlight areas without damaging the panel?
- Pixel Refresh
- Automatic Brightness Limiter (ABL) (Correct answer)
- High Bandwidth Memory
- Thermal Scaling
Correct answer: Automatic Brightness Limiter (ABL)
The Automatic Brightness Limiter (ABL) allows OLED panels to temporarily boost small screen areas to high peak brightness while managing total power draw and heat.
Question 6: What is the significance of a display's 10-bit panel capability in HDR certification?
- It enables higher refresh rates for HDR gaming
- It allows the display to render over 1 billion distinct colors, reducing banding (Correct answer)
- It increases the display's maximum resolution
- It reduces input lag for HDR processing
Correct answer: It allows the display to render over 1 billion distinct colors, reducing banding
A native 10-bit panel can display 1,024 levels per color channel (over 1 billion total colors), which is essential for smooth HDR gradients without visible banding.
HDR HDR Display Technology & Hardware 2
What is the black level requirement for a DisplayHDR True Black 400 certified display?