Gamingdeputy reported on May 8 that the Video Electronics Standards Association (VESA) issued a press release today announcing the DisplayHDR 1.2 specification and stated that there are currently more than 3,000 display models around the world certified by the DisplayHDR standard.
The DisplayHDR 1.2 version specification brings more stringent performance requirements. In addition to brightness, color gamut and bit depth, it also introduces color accuracy, contrast, and black level (black level, which refers to the absence of a single line on a calibrated display device. Multiple new test requirements for video signal levels of light output) and subtitle flicker.
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DisplayHDR v1.2 improves the white brightness level test, changing the 10% center block test on a black background to an 8% center block test on a non-black background.
This change provides for testing under more realistic conditions when the entire screen is lit; for example, an HDR video is played in one window while typical SDR-style screen content is displayed on the rest of the screen.
VESA also tightened the requirements for brightness and white point accuracy testing and expanded brightness testing to include a wider test range, from 1 cd/m to nearly 100% logo grade levels.
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| VESA DisplayHDR Requirements (Summary) | |||||
| 400 v1.1 | 400 v.1.2 | 500 v1.2 | 600 v1.2 | 1000 v1.2 | |
| Minimum brightness (10% APL, nits) | 400 | 400 | 500 | 600 | 1000 |
| Maximum brightness, black (nits) | 0.4 | 0.4 | 0.1 | 0.1 | 0.05 |
| static contrast | N/A | 1300:1 | 7000:1 | 8000:1 | 30000:1 |
| sRGB color gamut coverage | 95% | 99% | |||
| DCI-P3 color gamut coverage | N/A | 90% | 95% | ||
| Panel depth | 8-bit | 8-bit | |||
| Display IC bit depth | 8-bit | 8-bit + 2-bit FRC | |||
| HDR Color accuracy | N/A | Delta-TP < 8 | Delta-TP < 6 | ||
| Anticipated backlight | overall situation | overall situation | 1D/1.5D Zone Edge-Lit | 2D FALD | |
VESA is trying to solve a big problem with its updated DisplayHDR 1.2 specification: low-end HDR effects in PC monitors can be really bad.
Roland Wooster, chief engineer at Intel and chairman of the VESA Display Performance Index Group, said the 1.2 version of the specification tightened the relevant restrictions while expanding the scope and standards of testing.
The impact of the new specifications on users' purchase of monitors will still have to wait for some time. VESA stated that it will retain the DisplayHDR 1.1 specifications and certification until 2025, and notebook computers until 2026, in view of the situation where related products are still being developed.
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