Chinese language producer OnePlus is now releasing the ColorOS 12 public beta for the OnePlus 8 Professional and OnePlus 8T. The essential function on this replace is the addition of low-light and flicker-free eye safety (DC dimming perform). Recall that after the replace of the OnePlus 8T to ColorOS 12, the DC Dimming function surprisingly disappeared. OnePlus didn’t give any purpose or rationalization for its disappearance.
The present mainstream PWM dimming and DC dimming are a technique to modify the display brightness. PWM dimming modifications the display brightness by alternating on and off of the display. Why does my cellphone keep on once I modify the display brightness? That’s as a result of the on/off alternation is quick sufficient, past the vary of human eye notion. The longer the screen-off state lasts, the decrease the display brightness. Quite the opposite, the longer the screen-on time is, the brighter the display might be.
Nonetheless, completely different individuals’s eyes have completely different sensitivity to the display alternately on and off. Some persons are extra delicate. When encountering a display with low-frequency PMW dimming, eye discomfort will happen which can trigger extreme dizziness and nausea.
OnePlus brings again DC Dimming
DC dimming modifications the display brightness by growing or reducing the circuit energy, energy = voltage x present. Thus, altering the voltage or present will change the display brightness, and the dimming course of is softer. Though DC dimming can relieve the fatigue of the human eye when cellphones for a very long time, it’s extra pleasant to these customers who’re extra delicate to the low-frequency PWM dimming technique. Nonetheless, this resolution isn’t 100% excellent. At low brightness, DC dimming could trigger an uneven “rag display” phenomenon. This results in lack of dynamic vary and poor colour uniformity.
Studies from OnePlus executives declare that DC Dimming brings many new issues. This impacts the producer’s display after-sales and high quality fame.
In line with Oppo ColorOS engineers, Oppo’s DC dimming is completely different from different producers. It adopts the tactic of “masks dimming” + “dither smoothing”, by calling the interior Qualcomm Snapdragon platform – Snapdragon Show Engine layer mixing. Along with the clear mixing of Dim Layers, the brightness of the content material of the whole display has been successfully decreased. Nonetheless, it nonetheless retains the impact of the common DC Dimming.
As well as, Oppo continues to discover the backlight system and at last obtains three optimum worth coefficients. This lastly solves the issues of colour misalignment, flashing white mild, and unstable brightness values. It additionally maximizes the attention safety of the show impact.