Jasper Display demonstrates full-colour capable 1920x1080 µLED Si backplane

January 22, 2018 // By Julien Happich
At CES 2018, Jasper Display shared details about a new silicon backplane, the eSP70 tailored for the needs of µLED devices. The full-colour capable eSP70 panel features a resolution of 1920x1080, a pixel pitch of 8um and offers excellent current uniformity via a proprietary current source pixel. Uniformity is better than 1% across the array, claims the manufacturer.

The µLEDs on the eSP70 were provided and integrated by glō, a Google-backed, leading µLED device maker headquartered in Sweden.

On its website, Swedish startup glō claims it can transfer millions of defect-free GaN nanowire-based RGB microLEDs at high yields, from its wafers to active silicon backplanes or other substrate materials, including flexible ones.

“Our eSP70 demonstrates our ability to deliver on the promise of µLEDs. We’re excited to offer what the industry has been waiting for – silicon that has been designed with their µLED needs in mind. Our µLED backplane technology can be customized on a per-project basis, allowing us to make specialized silicon suiting needs ranging from low-power AR headsets all the way to automotive headlights” commented Jeffrey Li, Jasper Display's Director of Applications.

The high brightness µLEDs offer solves a key problem that AR glasses and HUDs are facing, namely that the brightness of sunlight makes images look dim and washed out. With the display technologies preceding µLEDs, getting enough brightness required a high power output which is a serious limitation for today’s compact, mobile, battery-powered systems that have strict power, space, and cooling budgets. With the eSP70 there’s the flexibility to have very high brightness with moderate power consumption or run with low power while maintaining a reasonable brightness level.

The fundamentally high contrast available with µLEDs makes a seamless AR or HUD experience possible. When a µLED is off, no light is emitted and the view of the environment is not blocked by unwanted light.

Besides increased brightness and contrast, JDC claims its patented, per-pixel pulse width modulation technology is well suited to µLEDs because digital switching allows for precise and consistent colouring; a single on-state current will deliver a single, stable colour, without colour shifting.

The eSP70 is software configurable which allows hardware developers to easily and precisely set their pixel current and voltage levels. eSP70 8" wafers are shipping now, produced in


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