The Problem with ABL: How EIZO Reduced Unnecessary Dimming

In many cases, the cause is Auto Brightness Limiter (ABL), a panel protection mechanism found in virtually every OLED monitor. ABL plays an important role in protecting OLED panels, but in colour-critical workflows, even small and unexpected brightness changes can become a distraction.

This creates an important challenge:

ABL exists for a practical reason.

As OLED panels display brighter images, power consumption and heat generation increase. Sustained high brightness places greater stress on the panel, which can affect long-term reliability and increase the risk of image retention or burn-in.

To help manage these challenges, OLED monitors use ABL, a mechanism that automatically reduces brightness under certain operating conditions.

Because it provides a simple and efficient estimate of panel load, it has become a common input for ABL systems. As APL increases, the monitor generally assumes that the OLED panel is under greater stress and responds accordingly.

The limitation of APL is that it reduces an entire image to a single number. What gets lost is how that brightness is distributed across the image.

During development of its OLED monitor, EIZO examined two HDR video samples. One contained high brightness concentrated within a small area of the screen. The other displayed significantly lower brightness across the entire screen. Despite these differences, both produced the same 10% APL, a level at which ABL would typically become active.

From the perspective of a conventional APL-based system, these images appear essentially the same. As a result, brightness limiting may be applied even when the content remains well within the panel’s display capability.

The issue is not that ABL activated. The issue is that the monitor may have reduced brightness even though the content placed no unusual demand on the panel. In a professional workflow, that distinction matters.

For professional users, consistency is image quality.

Small variations in image brightness can influence how content is interpreted and evaluated. If brightness changes unexpectedly, it becomes harder to determine whether the change originates from the source material or from the monitor itself. Over the course of a project, those small uncertainties can accumulate. They can slow reviews or simply make creators second-guess what they are seeing.

Professional users do not need a monitor that never manages brightness. They need one that behaves predictably, consistently, and with as little intrusion as possible.

Rather than asking whether ABL could be eliminated, EIZO focused on a more practical question:

Conventional ABL systems primarily evaluate average image brightness. EIZO’s ABL control system goes beyond this by analyzing how brightness is distributed across the screen.

This additional analysis gives the monitor a more complete understanding of image characteristics. Using an EIZO-developed algorithm, it can distinguish between concentrated highlights and broader areas of sustained brightness.

EIZO evaluated the ABL control system using HDR content ranging from moderately bright scenes to demanding high-luminance material. In some evaluated scenes, brightness limiting was no longer required despite conventional APL-based systems identifying the content as a candidate for ABL intervention.

As a result, content can be evaluated with fewer unexpected brightness changes getting in the way of the creative process.

Simply put, the less a creator needs to think about the monitor, the more attention they can devote to the image on screen.

EIZO’s ColorEdge monitors are widely used throughout post-production, VFX, animation, and other colour-critical workflows. In 2021, the Academy of Motion Picture Arts and Sciences recognised EIZO with a Scientific and Technical Award for the contribution of ColorEdge colour management technology to motion picture production.

These long-standing relationships provide EIZO with direct insight into the challenges creators face as workflows evolve.

Throughout the development of its OLED monitor, EIZO worked closely with customers in post-production, VFX, and animation to better understand real-world HDR workflows and the limitations professionals encountered with existing OLED solutions.

While OLED image quality was widely appreciated, discussions often focused on a broader goal: bringing the same trust, consistency, and predictability that users had come to expect from ColorEdge LCD monitors to OLED technology.

Customers emphasised two priorities. First, panel protection mechanisms should interfere as little as possible with creative work. Second, when brightness management does occur, it should be immediately visible and easy to understand.

These insights helped shape both EIZO’s ABL control system and the supporting tools designed to make its operation more transparent.

The result is a monitor developed not only through engineering analysis, but also through ongoing dialogue with the professionals who rely on accurate display performance every day.

As OLED panels continue to evolve, the industry will continue searching for better ways to balance panel protection, image quality, and professional workflow requirements. A professional OLED monitor should not only deliver outstanding image quality. It should also behave in a predictable and transparent manner that supports critical creative decisions.

EIZO’s ABL control system focused on ensuring that brightness management remains as unobtrusive as possible, allowing creators to spend less time thinking about the monitor and more time evaluating the content on screen.

Because when critical creative decisions are being made, confidence in what you’re seeing is just as important as image quality itself. The best monitor is one that fades into the background, allowing creators to focus entirely on the content and the decisions that bring it to life.