UPDATED. 2024-06-20 07:03 (목)
Samsung Display expects XR devices to eventually use one panel display
Samsung Display expects XR devices to eventually use one panel display
  • Gijong Lee
  • 승인 2024.05.26 20:30
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LED formation on CMOS substrate faces cost as obstacle
Image: Samsung Display
Image: Samsung Display

Samsung Display expects LED on silicon (LEDoS) displays used on augmented reality devices to be a monolithic one panel, a senior executive said.

Samsung Display vice president Huh Jong-moo said on Thursday in the Microdisplay Conference hosted by TheElec that LEDoS technology is expected to evolve from blue and quantum dot (QD) to RGB three panels, to ultimately monolithic one panel.

LEDoS is a technology that forms countless micrometer-sized LEDs on a silicon substrate.

The technology is touted as the future for microdisplays on extended reality devices due to its brightness advantage.

Blue and QD LEDoS is made through forming blue LEDs on a CMOS panel, or backplane. A QD layer with a microlens array atop it is used to realize the other colors red and green and increase brightness.

RGB three panels use three CMOS panels, each with red, green, and blue LEDs. This method requires a waveguide technology to control the light waves.

Monolithic one panel uses just one CMOS panel with the R, G, and B LEDs on it either vertically stacked or aligned together horizontally.

R, G, and B OLEDs can be deposited together on glass or CMOS panels but LED requires a high-temperature epi-process, Huh said.

But RGB LEDs must be made individually before being mounted on the CMOS panel, he added, hence the difficulty and concern over cost.

This means LEDoS technology on microdisplay wasn’t just an extension of OLED but requires new technologies in optics, panels, processes, and materials, which can create new value for the display industry, the vice president said.

Reality devices are yet to kick off due to lack of content, inconvenience of the devices, and high cost, Huh said, stressing that the market for microdisplays is yet at an early stage.

Samsung Display started what it calls the M Project in 2022 to develop LEDoS and OLED on silicon microdisplays aimed at reality devices.

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