dualbrightness

Dualbrightness refers to a display technology that utilizes two different light sources or methods to control screen brightness. Typically, this involves a primary backlight, such as an LED array, and a secondary, often more localized, dimming or brightening mechanism. This secondary mechanism can take various forms, including local dimming zones within the LED backlight, or even a separate layer of pixels that can emit or absorb light.

The primary benefit of dualbrightness technology is improved contrast and a wider dynamic range. By selectively dimming or brightening specific areas of the screen, the display can achieve deeper blacks and brighter whites simultaneously, leading to a more visually impactful image. This is particularly noticeable in scenes with both very dark and very bright elements, such as a night sky with stars or a film with dramatic lighting.

Another advantage can be enhanced power efficiency. By dimming areas of the screen that do not require high brightness, less power is consumed overall. This is especially true for displays that employ local dimming, where only the necessary backlight zones are illuminated.

However, dualbrightness implementations can sometimes introduce artifacts. For instance, with local dimming, halo effects can occur around bright objects on a dark background if the dimming zones are too large. Achieving a balance between performance, image quality, and cost is a key consideration in the design and implementation of dualbrightness displays.