TECH FOCUS DISPLAYS
Tech Focus sponsored by
HOLOEYE FEATURED PRODUCT
New compact phase only spatial light modulator – Luna
The new Luna spacial light modulator (SLM) is based on an 0.39” LCOS microdisplay with a resolution of 1,920 x 1,080 pixels and 4.5µm pixel pitch.
The SLM provides linear 8 bit phase levels and is addressed via DisplayPort at 60 Hz input frame rate. Holoeye currently offers
two versions of the Luna SLM: A VIS version (2 Pi phase shift @ 420 650 nm) and a version for the telecommunication waveband, around 1,550nm
MicroLEDs printed on a 300mm wafer
nanowires (GaN crystals of sub-micron diameter) on top of large-area silicon (called ‘3D’). This 3D nanowire technology does not create any of the stresses seen on 2D chips, which build up as the wafer size is increased, and so allows the use of very large-size wafers. In addition, this silicon-based
technology allows production in conventional microelectronics fabs, called silicon foundries, which can be ramped up to high-volume production with extremely high yield. Emmanuel Sabonnadière, CEO of CEA-Leti, said: ‘We are very pleased to have
www.electrooptics.com | @electrooptics
“We believe large-area silicon wafers are the best manufacturing platform in the world today for displays, and give big advantages”
helped Aledia push forward the state of the art of 3D LED manufacturing, using our 300mm silicon processing line. We believe large-area silicon wafers are the best manufacturing platform in the world today for displays,
and give big advantages in manufacturability. ‘3D nanowire micro-LEDs
have the potential to make serious penetration into large display markets. CEA-Leti is very active today in supporting the display industry’s transition to microLED technology.’ Aledia’s Anania added:
‘We believe the use of large- area silicon wafers and microelectronics foundries are the only way to deliver the huge volumes demanded by end-user markets. For example, if only the large-screen TVs of 60 inch in diagonal, and larger, transitioned to silicon
nanowire technology to obtain better image quality and lower manufacturing costs, this would require 24 million 300mm wafers per year, volumes that can only be delivered by the silicon industry and supply chains. Smartphones, laptops and tablets would be on top of that.’
In October, Aledia raised €80m, the first part of its €120m D-round financing. The company will use the proceeds to complete its product development and create a high-volume 3D microLED manufacturing facility in the Grenoble area of France. EO
March 2021 Electro Optics 41
(1,400-1,700nm). The driver ASIC is embedded in the LCOS microdisplay itself. This saves board space, which enables a very compact driver and enables implementation into small sized and portable solutions. The standard driver box has a size of only 85 x 47 x 28 mm.
The display can even
accept video data input via a four-lane MIPI DSI. This novel approach brings phase only SLM technology to a new level of potential for industrial implementations.
https://holoeye.com/luna-phase- only-spatial-light-modulator/
Aledia and CEA-Leti
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