In a new milestone, LG Display has announced that it earned the industry’s first 100% dimming consistency verification from UL Solutions, a global leader in applied safety science. The company says that all of its large-sized OLED panels, including those for TVs and monitors, earn recognition for their perfect dimming technology.
LG Display earns the industry’s first 100% dimming consistency verification for OLED
For context, “dimming consistency” refers to a measurement method that evaluates how effectively a display reproduces content based on its brightness performance. A reference area is set in the center of the screen and is gradually reduced from 1/10 of the panel to 11/1000, 5/1000, and finally 2/1000. The results are given as a percentage. If the maximum and minimum brightness values stay the same throughout the process, the dimming consistency is 100%.
In contrast, a lower score indicates that there is a light intensity fluctuation within the same screen. During such cases, the brightness differs depending on the position of the light source, even when displaying the same color. LG Display’s OLED has maintained the same brightness performance even as the test reference area decreased. This led to a dimming consistency rate of 100%.
LG OLED panels maintained the same brightness performance
Meanwhile, LG’s LCD panels became dimmer as the test reference area shrank. The dimming consistency dropped from a maximum of 83% to as low as 43%. This is because of the difference in emission methods. OLED panels emit light at the pixel level; they can maintain consistent brightness even when the test reference area is reduced. This allows the screen to produce natural colors and clearly distinguish color boundaries.
In comparison, the RGB Mini LED, the latest LCD TV technology, relies on backlight blocks that are 160,000 to 830,000 times larger than the pixels of an OLED panel. Because these blocks are much bigger, brightness often fades at the edges. This makes colors less accurate and also makes it difficult to clearly distinguish color boundaries. However, it may also cause light bleeding, also known as the halo effect.
With the halo effect, light leaks from the boundaries of the backlight blocks of an LCD panel, making the image appear hazy. As OLED offers 100% dimming consistency, it avoids this issue. LG says this makes OLED the optimal display for connecting humans and AI. In the AI era, high luminance, high resolution, and high color gamut performance are essential. With 100% dimming consistency, the OLED display can deliver rich visuals generated by AI more naturally.
Plans to further strengthen
LG Display plans to further strengthen its large-sized OLED leadership based on OLED technology. LG’s new OLED TV panel applies its proprietary “Primary RGB Tandem 2.0” technology. This emits light by stacking red, green, and blue in independent layers.
The new OLED panel reaches a peak brightness of up to 4,500 nits. It also incorporates a new technology that absorbs light instead of reflecting it, achieving a record-low 0.3% reflectance level for a clear picture.
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