Reducing Screen Door Effect in Micro-LED Displays
2 patents in this list
Updated:
Micro-LED displays offer vibrant visuals, yet the screen door effect can disrupt the viewing experience by creating noticeable grid lines on the screen. This visual artifact occurs when the spaces between pixels become visible, particularly in large displays or when viewed up close. As display technology advances, eliminating this effect becomes crucial for achieving seamless, high-resolution images that meet the expectations of professionals and consumers alike.
Addressing the screen door effect involves tackling several challenges, such as enhancing pixel density and improving light diffusion. Engineers must balance these factors without compromising display brightness or color accuracy. The complexity of the task lies in integrating solutions that are both effective and feasible for mass production.
This page presents a range of strategies and technologies aimed at reducing the screen door effect in micro-LED displays. Techniques include the use of curved light diffusion layers, innovative micro-LED module designs, and anisotropic optical layers. These approaches enhance display performance by smoothing out pixel boundaries and improving light uniformity, ultimately delivering clearer and more immersive visual experiences.
1. Micro LED Display Panel with Uniformly Distributed Sub-Pixel Micro LED Array
SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD., 2018
Micro LED display panel with improved resolution, reduced screen door effect, and lower cost compared to conventional micro LED displays. The panel has an array of sub-pixel areas on the substrate, each filled with uniformly distributed micro LEDs. This allows higher resolution by packing more LEDs in each sub-pixel without increasing inter-pixel gaps. By optimizing the number of LEDs per sub-pixel, it balances resolution, screen door effect, and cost compared to using a single large LED per sub-pixel. The micro LEDs are transferred using a process like micro transfer printing.
2. Segmented LED Arrays with Integrated Diffusing Elements and Inter-segment Walls
Lumileds LLC, 2022
Segmented LED arrays with diffusing elements to improve uniformity and reduce patterns when using secondary optics. The arrays have LED segments separated by walls. Diffuser material is placed directly over the LEDs or wavelength converter to scatter light before it reaches secondary optics like lenses. This avoids patterns when using focus techniques. The diffuser can be columns, domes, or a continuous layer over multiple LEDs.
