What is active HDR technology?

Hdr and 4k are the attributes of the film source, which has nothing to do with the display, but the limit contrast of hdr is generally high, and the number of brightness levels is quite different, which exceeds the hardware contrast and gray level of the display, so even if the hdr film source is played, the ordinary display can not achieve the effect of the film source itself.

The hdr display adjusts the backlight brightness of different partitions through the partition backlight, which increases the contrast and makes the display effect close to the hdr film source.

Active hdr needs hardware support first, and then ordinary non-hdr video needs chip optimization. Just like AMD graphics card pins, even ordinary film sources simulate the display effect of hdr through color optimization.

At present, the best playing effect is definitely organic light-emitting diodes. Infinite comparison doesn't need to spend money on hdr patents at all, which wastes money. Close to infinite contrast, you can hang any detection mark. Secondly, many of lg's IPS screens are active hdr, and lg's displays are always accurate in color and comfortable to look at. Although Sony is a big TV manufacturer, the quality of TV effects is ok, but it is rigid and rich in colors, but the color temperature and color accuracy are very poor, and there is no active hdr. Low-end display technology is generally backward.