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In the Future, the Apple Vision Pro display will advance to LEDoS and Samsung revealed yesterday that development is now underway

1 cover Kim Gong-min director of Samsung Display Research

In March, Patently Apple posted a report titled "While Apple's initial XR Headset displays will be supplied by LG & Sony, Samsung is developing a new OLEDoS display." Then in May, OLED firm eMagin announced that it would be merging with Samsung Display and secure RGB OLED on silicon (OLEDoS) technology for expanded reality devices through the merger. This fits well with Samsung Display’s plan to develop RGB OLEDoS in the long term to supply to key customer Apple. In the big picture, Apple suppliers LG and Samsung are working on the next-gen display for AR devices known as LEDoS.

Yesterday Samsung Display announced that it has started developing LEDoS (LED on Silicon) technology that can be used in augmented reality (AR) devices. It was also revealed that the size of the microLED chip will be less than a few micrometers.

The Elec reports that Kim Gong-min, executive director of Samsung Display R&D Center's technology strategy team, made this statement at the 'Deep Tech Forum 2023' held by The ELEC at the Posco Tower in Yeoksam, Seoul on the 11th.

The Mixed Reality (MR) device Vision Pro, which Apple unveiled last month, uses OLEDoS (OLED on Silicon) technology that deposits organic light emitting diodes (OLED) on a silicon substrate. OLEDoS can be used in virtual reality (VR) devices that block the external environment, but the dominant prospect is that it is difficult to use OLEDoS in augmented reality (AR) devices that can see the external environment due to limitations in brightness (luminance).

Kim Gong-min added that "OLEDoS has limitations in meeting the conditions of bright brightness, light form factor, and product lifespan required to implement microdisplays for AR devices. The goal is to secure characteristics while making LEDs very small in order to secure higher resolution and brightness, better characteristics, and product lifespan," said Kim. We are developing LEDOS technology using light emitting diodes (LEDs).”

Further, "The wafer technology on the backplane side is currently a stumbling block," and "If you make (micro LED chips) smaller to implement ultra-high resolution screens using the semiconductor process, completely different characteristics from the LEDs used for lighting appear." revealed Director Kim explained, "When the LED size is smaller than 20um or 10um, the characteristics drop significantly, and expected functions are not secured. The challenge is to prevent this and implement (desired functions).

(AR/VR devices) are near-eye (close to the eyes) displays, so they need a different concept from existing displays. Instead of PPI (Pixels Per Inch), which is the pixel density used in conventional flat-panel displays, the concept of PPD (Pixels Per Degree) is important."  

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