In the past two years, we have felt that HDR technology has been added to high-end TVs and monitors. Even industry chips, display panels, monitors, PCs, and system vendors participate in the development of relevant HDR standards. What are the advantages of this frequently exposed technology?
Why are more and more display devices adding HDR technology?
HDR technology is an abbreviation for high dynamic lighting rendering, also called high dynamic range. Compared with ordinary image processing, HDR can provide more dynamic performance and image details, and finally synthesized according to the optimal details corresponding to different exposure times. The image can better reflect the visual effects of objects in the real environment.
↑↑↑HDR on/off effect comparison chart
HDR technology enables brightness range, enhances the contrast of the brightest and darkest picture, thereby obtaining a wider range of colors, in addition to significantly improving the grayscale, it also brings a darker or whiter color effect.
It can be said that displays equipped with HDR technology can be fully improved in terms of sRGB, brightness, and color expression. The effect on the image quality is very obvious.
All in all, HDR technology's image quality improvement is intuitive. In recent years, many display manufacturers have adopted HDR technology on their products, which can bring high contrast and excellent color performance.
In addition, if HDR is mounted on an OLED product, a more astounding display effect may be born. OLEDs can abandon the backlight source to achieve self-illumination at each pixel. The high dynamics of HDR can be fully utilized in OLED TVs.
DisplayHDR 1.0 standard
In terms of technical standards, there is an open HDR-10 in the TV field, a patented Dolby Vision, and the VESA (Video Electronics Standards Association) is now launching the first brand-new HDR technology standard for display monitors - DisplayHDR 1.0.
The image quality improvement of HDR technology is intuitive
The Display HDR 1.0 standard is aimed at LCD LCD displays that occupy more than 99% of the market's products. It defines three different levels. The requirements for display brightness, color gamut, color depth, and other specifications vary, but all must have a true 8-bit color display panel ( Market share about 15% ):
The Display HDR 400 is the lowest-end, requiring global dimming support, a peak brightness of not less than 400 nits, a globally consistent brightness of not less than 320 nits, and an ITU-R BT.709 color gamut (basically equivalent to the sRGB gamut) covering no less than 95%. And support HDR-10.
The Display HDR 600 is aimed at high-end displays and notebooks. It requires 10-bit processing capability, 600 nits of peak brightness, 350 nits of continuous brightness, 8 monochrome response times, and 99% color gamut coverage. ITU-R BT.709, 90% DCI- P3 65.
The Display HDR 1000 only has the professional display to be competent, the peak brightness is 1000nit, the continuous brightness is 600nit, and the color gamma has obviously improved.
So at present, we can also judge the professional level of the monitor through the HDR standard supported by the monitor.
