WeiSin Tan | Jade Bird Display: What are the critical design and manufacturing challenges in developing a single-panel RGB microLED display with sub-5 micron pixel pitches?
07:38 - 09:05
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What are the critical design and manufacturing challenges in developing a single-panel RGB microLED display with sub-5 micron pixel pitches?
Developing single-panel RGB microLEDs necessitates careful consideration of several design parameters, including the choice of bonding methodology—whether metal-metal, oxide-oxide, or hybrid approaches—and the optimal material for the red emitter. JBD currently favors phosphide-based red emitters due to their ability to operate effectively at high current densities, ranging from 100 to 500 mA per square centimeter, a performance characteristic not typically matched by nitride or quantum dot alternatives. Furthermore, the stacking configuration, whether co-axial or side-by-side, significantly impacts overall performance and manufacturability.
Manufacturing these advanced displays presents its own set of challenges, particularly in achieving an ultra-low defect density of less than 10 parts per million, which translates to five nines of perfection. JBD has evolved its structure to address these issues, removing dark spots on red and green pixels, substantially improving the bonding process to enhance yield, and introducing specific crosstalk blocking structures. These innovations have reduced light leakage into the cone to less than 3%, demonstrating significant progress in mitigating optical interference.
In this short video, you can learn:
* Key bonding approaches for stacked microLEDs.
* Material selection considerations for red emitters.
* Impact of stacking configurations on display performance.
* Strategies for achieving high manufacturing yield and crosstalk reduction.
#MicroLEDBonding, #PhosphideEmitters, #StackedMicroLEDs, #CrosstalkMitigation, #MicroLED, #ARVRDisplays
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Monolithic MicroLED Microdisplays for AR Applications
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01:30 - 02:12
How does JBD achieve world-leading microLED efficiencies and ultra-low defect densities at sub-5 micron pixel pitches?
How does JBD achieve world-leading microLED efficiencies and ultra-low defect densities at sub-5 micron pixel pitches?
JBD employs a distinctive microLED fabrication process that begins with an epi wafer, which is then bonded onto an IC backplane. Following this critical bonding step, the original substrate is meticulously removed, allowing for subsequent wafer processing. This proprietary sequence is fundamental to achieving the high performance metrics observed in their displays.
The company reports world-leading efficiencies for InGaN blue and green emitters, as well as phosphide red emitters, all at pixel pitches less than five microns. As the first company to mass produce these displays, JBD has accumulated significant expertise in manufacturing, particularly in maintaining ultra-low panel defect densities, targeting less than 10 parts per million. This commitment to advanced manufacturing and extensive R&D is underscored by their portfolio of over 700 patents.
In this short video, you can learn:
* JBD's proprietary microLED fabrication sequence.
* How high efficiency is achieved in specific color ranges.
* Strategies for maintaining ultra-low defect density in mass production.
#EpiWaferBonding, #SubstrateRemoval, #InGaNEmitters, #UltraLowDefectDensity, #MicroLED, #ARVR
03:38 - 04:10
What technical innovations enable a wireless AR glass development kit weighing only 54 grams with 4000 nits brightness?
What technical innovations enable a wireless AR glass development kit weighing only 54 grams with 4000 nits brightness?
JBD has launched the Power Light Dev Kit, a wireless AR glass development kit designed with a remarkably compact form factor, weighing just 54 grams. This binocular device offers a 25-degree field of view and achieves a substantial brightness of 4,000 nits, making it suitable for various augmented reality applications. Its display capabilities are powered by JBD's advanced Gen 2 light engine, featuring 500 by 380 pixels at a four-micron pitch.
The kit integrates a diffractive optical waveguide for efficient light delivery and operates on an Android 64-bit OS, providing a robust platform for developers. The strategic intent behind this dev kit is to empower AR glass manufacturers by providing a tool to efficiently check display performance, debug software, and ultimately accelerate their product development cycles.
In this short video, you can learn:
* Key specifications of the Power Light Dev Kit.
* The role of JBD's Gen 2 light engine in compact AR solutions.
* Integration of diffractive optical waveguides for display.
* The kit's utility for accelerating AR product development.
#MicroLEDLightEngine, #DiffractiveWaveguide, #UltraCompactAR, #HighBrightnessAR, #AugmentedReality, #MicroLEDDisplays