Kim and Shin’s co-authors include members of Kim’s lab, researchers around MIT, and collaborators from Georgia Tech Europe, Sejong University, and multiple universities in the U.S, France, and Korea. The team’s results are published today in the journal Nature. “With our vertical micro-LEDs, you could have a completely immersive experience and wouldn’t be able to distinguish virtual from reality.” “For virtual reality, right now there is a limit to how real they can look,” adds Jiho Shin, a postdoc in Kim’s research group. “We show that vertical pixellation is the way to go for higher-resolution displays in a smaller footprint.” “This is the smallest micro-LED pixel, and the highest pixel density reported in the journals,” says Jeehwan Kim, associate professor of mechanical engineering at MIT. ![]() The microscopic pixels, or “micro-LEDs,” can be packed to a density of 5,000 pixels per inch. Illustration by Younghee LeeĮach stacked pixel can generate the full commercial range of colors and measures about 4 microns wide. Instead of patterning red, green, and blue diodes side by side in a horizontal patchwork, the team has invented a way to stack the diodes to create vertical, multicolored pixels. MIT engineers have developed a new way to make sharper, defect-free displays. Instead of replacing red, green, and blue light-emitting diodes side by side in a horizontal patchwork, the team has invented a way to stack the diodes to create vertical, multicolored pixels. Now, MIT engineers have developed a new way to make sharper, defect-free displays. This limit is especially noticeable in close-range displays such as augmented and virtual reality devices, where limited pixel density results in a “screen door effect” such that users perceive stripes in the space between pixels. Over the years, the size of individual pixels has shrunk, enabling many more of them to be packed into devices to produce sharper, higher-resolution digital displays.īut much like computer transistors, LEDs are reaching a limit to how small they can be while also performing effectively. When electrically powered, the LEDs together can produce every shade in the rainbow to generate full-color displays. Take apart your laptop screen, and at its heart you’ll find a plate patterned with pixels of red, green, and blue LEDs, arranged end to end like a meticulous Lite Brite display. Facebook Twitter LinkedIn Google Plus Email
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