Apple has unveiled its long-awaited MR device, “Vision Pro,” which provides a clearer perspective on the potential and applications of AR devices. Despite not being as bulky as VR devices, Vision Pro still has a way to go before reaching the ideal form of AR glasses.

Apple’s Vision Pro utilizes Micro OLED technology and can display facial expressions on the outer screen. The industry anticipates that as AR technology evolves, a transition from Micro OLED to the equally next-gen Micro LED could make AR devices lightweight and more like glasses.

However, the question remains: what advantages does Micro LED bring to AR technology? Why did Apple opt for Micro OLED initially? And are there other display technologies suitable for AR applications?

AR devices: Striking a Balance between Ideal and Reality

In reality, achieving the truly ideal AR product might be premature given current technology. Most AR functional products strictly employ video see-through (VST) technology, where cameras capture real-world scenes, and computational and computer graphic techniques combine to display them on opaque screens.

The ideal is optical see-through (OST) technology, where users perceive the real world through a semi-transparent optical combiner in front of their eyes, coupled with projections onto the user’s eyes, merging the real and virtual worlds.

TrendForce discloses that ideal see-through smart glasses must meet three criteria: firstly, the display light engine must be compact, around 1 inch or smaller, to minimize the glasses’ wearing burden. Secondly, in terms of content recognition requirements, the display brightness specifications should reach at least 4,000 nits to ensure resistance to external factors like weather and environment. Lastly, the resolution must be at least 3,000 PPI for clear projected images.

Industry experts note that see-through AR glasses’ main scenarios are outdoors and on the move. These scenarios require consideration of outdoor weather and brightness, particularly as current waveguide lens efficiency is low, around 0.1-1%, causing substantial light loss. Generally, AR display brightness must exceed 1 million, even 10 million nits.

AR Glasses Development: Which Display Technology Holds the Edge?

Mainstream display technologies for AR glasses include PM(Passive Matrix) micro-display technology, AM(Active Matrix) micro-display technology, and scanning display technology.

PM micro-display technology encompasses LCD, LCOS (Liquid Crystal on Silicon), and DLP (Digital Light Processing) technologies, requiring RGB LED or RGB laser light sources. While mature, they tend to have larger light engines compared to other technologies.

AM micro-display technology includes Micro OLED and Micro LED. Micro OLED features self-emission properties but struggles with brightness. Micro LED outperforms Micro OLED in contrast, lifespan, and power efficiency, but integrating RGB remains challenging.

Scanning display technology (LBS) employs RGB lasers and MEMS for scanning imaging but might lead to speckle.

Analysis of Micro OLED, Micro LED, LCOS, and LBS Technologies

• Micro OLED: Suited for VR/MR devices, but brightness is a limitation

Apple’s Vision Pro uses Micro OLED technology, but its organic light-emitting characteristics result in lower brightness compared to Micro LED, LBS, LCOS, and DLP.

Despite efforts to enhance brightness through different layers, pattern adjustments, and phosphorescent materials, increasing brightness shortens organic material lifespan. Sony remains a key Micro OLED provider, but but recent reports indicate that LGD (LG Display) has joined Apple’s Vision Pro Micro OLED supply chain, potentially boosting production and reducing costs.

• Micro LED: Strongest contender for AR applications but faces technological challenges

Micro LED excels in PPI, brightness, contrast, and light engine size. However, its technological maturity is a major concern. Micro LED AR glasses predominantly display monochrome images due to colorization barriers. Achieving high resolution requires chip scaling, with Micro LED sizes shrinking to 5um. Challenges include uniform wavelength distribution and external quantum efficiency for red LEDs.

• LCOS: Mature but high power consumption and low contrast limit development

LCOS is a common AR device display technology with low cost and broad color gamut. Its reflective nature achieves high brightness, up to 40% light utilization, and increased resolution as semiconductor processes refine. However, it suffers from low contrast and requires a polarizing beam splitter (PBS), hindering downsizing.

• LBS: Small light engine rivaling Micro LED, but technology remains nascent

LBS employs RGB lasers as light sources, via optical element calibration and MEMS image scanning. Light then couples into waveguides. LBS offers high brightness, low power consumption, pure color, and high contrast. However, laser-induced speckle is possible. Ams OSRAM developed an RGB integrated laser with MEMS, shrinking the light engine to under 1cc.

Key Hurdle in AR Glasses Technology: Light Engine Size

Light engine size is pivotal for lightweight AR glasses. To achieve a near-normal glasses form factor, the light engine must be around 1cc or smaller, becoming an industry consensus.

For full-color light engines to reach this target, only LBS, Micro OLED, and Micro LED have opportunities. Micro LED’s pixel size, light efficiency, and brightness outperform Micro OLED, making it the preferred choice for light engines.

However, TrendForce states that while Micro LED’s technology maturity is evolving, challenges remain with red LED external quantum efficiency, micro display size, and FOV issues. Additionally, long-term wear and sensor integration for data transmission and processing pose further challenges.

(Photo credit: Apple)

When Apple unveiled its inaugural wearable device, the Vision Pro, in June this year, CEO Tim Cook remarked, “Apple Vision Pro introduces us to spatial computing.”

The era of spatial computing entails redefining how users interact with digital content within the context of the real world. Apple’s ambition extends beyond mere immersive entertainment, aiming to seamlessly integrate personal computers and smartphones into everyday life and work scenarios, replicating the success it achieved in personal and mobile computing.

The launch of the Vision Pro has once again thrust new display technologies into the industry spotlight. Although the Vision Pro employs Micro OLED, the potential to achieve a portable, outdoor-capable mixed-reality headset rests on Micro LED, seen as the most promising option.

“Micro LED demonstrates balanced performance beyond average levels in terms of brightness, energy consumption, pixel density (Pixel per Inch, PPI), and optical module size,” noted Eric Chiou, Senior Research Vice President at TrendForce. He further emphasized Micro LED’s potential in the development of AR devices, stating, “This also explains why Meta, Google, and MIT are continuously evaluating and assisting in the development of Micro LED technology.”

The application potential of Micro LED in AR devices is evident from the number of companies investing in its development.

In the first half of 2023 alone, six companies—Raysolve, Porotech, Sitan, Kopin, GoerOptics, JBD—announced progress in the development of Micro LED micro-display products. Additionally, two AR glasses manufacturers, Rayneo Innovation and Nubia, unveiled products featuring Micro LED chips.

Certainly, Micro LED’s implementation is not confined to AR eyewear; it is making inroads into the realm of wearables, particularly in the form of smartwatches. Soon, consumers will find the first commercially available watch featuring a Micro LED screen on the market. Tag Heuer, a luxury watch brand, is leading the way with support from AU Optronics for Micro LED panels.

Anticipation mounts for an Apple Watch featuring a Micro LED screen, with rumors circulating consistently. According to earlier information from TrendForce, the release of the Micro LED version of the Apple Watch, originally projected for the second half of 2025, has been delayed to the first quarter of 2026. Initial reports suggested the supply of Micro LED chips would come from Epistar and Osram and that Apple would handle mass transfer at its Longtan facility. Recent reports, however, suggest that Apple might entrust mass transfer and subsequent work to its long-term collaborator, LG Display (LGD).

It’s rumored that LGD has visited Apple’s Longtan facility, indicating a potential handover of equipment to LGD, facilitating smooth mass transfer and back-end processes. Despite shifts in the supply chain, this alteration underscores Apple’s commitment to advancing the Micro LED version of the watch into mass production, with wearables continuing to play a pivotal role in the practical implementation of Micro LED.

The industry’s technological development and investment in wearables, particularly watches and AR glasses, demonstrate a shift towards small-sized sectors represented by headsets and wearables. This indicates that Micro LED is edging closer to large-scale commercialization and breakthrough applications.

Regarding the commercial development of Micro LED, the launch of large-sized products remains a critical indicator. Korean giants Samsung and LGD are pivotal players in this regard. Following Samsung’s introduction of the high-end 110-inch Micro LED TV, LGD’s plans to release a 136-inch Micro LED TV in 2024 have surfaced. Factoring in Samsung’s and LGD’s entries, a total of five companies, including AUO, BOE, and SmartKem, have announced developments in Micro LED display technology in 2023.

Considering the market trends mentioned above, based on TrendForce’s projections, the production value of Micro LED chips is expected to reach $27 million in 2023, showing a 92% annual growth. Looking ahead, driven by the expansion of current application shipments and the introduction of new use cases, the estimated chip production value is set to hit $580 million by 2027. This anticipates a compound annual growth rate of 136% from 2022 to 2027.

(Photo credit: Samsung)

According to the news from Taiwan tech media, TechNews, in a groundbreaking move, Samsung has unveiled its inaugural 110-inch Micro LED television, signaling a significant foray into the premium TV segment. Not to be outdone, competitor LG Display (LGD) is reportedly poised to make its own mark by launching a 136-inch Micro LED smart display next year, with initial applications targeted at theaters, indoor conference rooms, and other similar venues.

According to insider sources, LGD is gearing up for mass production of its impressive 136-inch Micro LED display, expected to commence around July of the upcoming year. The initial production goal is set at over 100 units, with deployment primarily earmarked for theaters, indoor conference facilities, and possibly large-scale corporate headquarters.

Notably, LGD’s ambitious 136-inch smart display project is a collaborative effort with Micro LED from Unikorn Semiconductor, which is a subsidiary under Ennostar. Unikorn emphasized the paramount significance of this partnership, affirming substantial breakthroughs in both quality and yield through their joint endeavors. By elaborating during a recent press conference, underlining the imminent production review phase scheduled for the third and fourth quarters – a pivotal juncture that could potentially elevate Micro LED’s contribution to Unikorn’s revenue to a significant proportion. Interestingly, this timeline harmonizes with LGD’s projected rollout of their Micro LED smart display.

But, Ennostar has no comment regarding this development, refraining from disclosing any customer-related particulars.

LGD is currently making assertive strides in the fiercely competitive Micro LED technology landscape. Notably, LGD recently acquired a set of 14 U.S. patents related to Micro LED technology from Taiwanese firm Ultra Display Technology, according to reports from, The Elec, a South Korean media outlet. These patents encompass crucial transfer processes, underscoring LGD’s strategic approach.

Furthermore, whispers from the industry suggest that Apple’s extensive Micro LED transfer process for the Apple Watch could see a significant handover to LGD. This would entail LGD overseeing an integrated workflow, encompassing chip manufacturing, backplane assembly, and transfer processes, while Apple retains responsibility for device design and pivotal technical support. The anticipated mass production timeline for the Micro LED-equipped Apple Watch has been deferred to the first quarter of 2026, a delay likely attributed to the recalibration of the production supply chain.

(Photo credit: LGD)

Sony, a major supplier of Apple’s camera sensors, suggests weaker demand for the upcoming iPhone 15 due to a lackluster year for Apple’s iPhone sales. Economic challenges have affected iPhone sales, though service revenues have offset losses. The flagship iPhone 15 series is scheduled for a September release.

Sony the world’s largest sensor supplier, had previously projected a gradual recovery in its smartphone imaging and sensing business by the second half of 2023. However, during its latest earnings call, the company revealed that this recovery might not take shape until 2024, mainly attributing the delay to underwhelming sales in the Chinese market.

Sadahiko Hayakawa, Sony’s Senior General Manager of Finance, stated, “The recovery pace of the Chinese smartphone market has been slower than our expectations, and the situation in the US market is worsening. We originally anticipated the smartphone market to recover starting from the second half of this fiscal year, but our current assessment suggests that it might not happen until at least next year.”

Sony’s top brass attribute a cautious outlook to a sluggish global economy and geopolitical uncertainties, hinting at muted demand for the iPhone 15 series. This stance resonates with analyst Ming-Chi Kuo view at TFI Securities, forecasting that iPhone 15 might struggle to surpass iPhone 14 sales records, posing challenges to Apple’s suppliers in H2 2023.

Apple reported a 2.4% decline in iPhone sales for its third fiscal quarter, reaching $39.7 billion, slightly below analyst estimates of $39.9 billion. The US region saw a 5.6% year-on-year drop in sales, highlighting a performance that falls short of expectations.

(Source: https://news.cnyes.com/news/id/5282617)

In about a month’s time, the smartphone market is gearing up for Apple’s flagship iPhone 15 series of the year. This annual anticipation leads to a surge in online appearances of models for reference, typically emerging one to two months ahead of the new phone’s unveiling. TechNews, a Taiwanese tech media also acquired an accurate mock-ups mimicking upcoming iPhones, providing an advanced peek into the forthcoming changes in this year’s iPhone 15 series.

• Maintaining 4 Models, 2 Sizes

Similar to last year’s iPhone 14 series, Apple is projected to release 4 models in 2 sizes this year. These include the 6.1-inch iPhone 15 (which some suggest might grow to 6.2 inches) and the iPhone 15 Pro, along with the 6.7-inch iPhone 15 Plus and iPhone 15 Pro Max (which could potentially be renamed iPhone 15 Ultra).

• Entire Series Adopts Dynamic Island

Dynamic Island design made its debut in last year’s iPhone 14 Pro series, while the iPhone 14 and iPhone 14 Plus retained the traditional notch design. However, even the more affordable iPhone 15 variant will undergo a change, syncing with the Pro version by replacing the notch with a dynamic island design.

Notably, due to the adoption of the dynamic island design for the iPhone 15, some speculate that the screen size might marginally expand to 6.2 inches this year.

• All 4 Models Get a ‘Port’ Change

In response to EU regulations, rumors in the market suggest that Apple is set to switch all models in the iPhone 15 series from the previous Lightning port to the USB-C charging port. From the obtained muck-ups, it appears certain that the entire iPhone 15 series will indeed transition to USB-C ports.

• Larger Camera Modules, Slight ‘Slimming’ for Pro Models

Fitting iPhone 15 series muck-ups with protective cases designed for the iPhone 14 series reveals that, while all 4 models can accommodate iPhone 14 series cases, a closer examination of the camera reveals that the iPhone 14 series case slightly interferes with the lowermost lens.

Furthermore, this year’s iPhone 15 Pro series will have further narrowed screen bezels, down to 1.55mm from the previous 2.2mm. Consequently, the iPhone 15 Pro muck-up will be slightly slimmer than their iPhone 14 Pro predecessors, resulting in a slightly looser fit when encased.

Other Speculations

The information provided by the muck-ups remains limited, leaving us to wonder about potential additional changes to this year’s iPhone 15 series.

As expected, the iPhone 15 Pro series processor is likely to see an upgrade to the A17 Bionic chip (manufactured using TSMC’s 3nm process), while the more budget-friendly iPhone 15 and iPhone 15 Plus will possibly adopt last year’s A16 processor from the iPhone 14 Pro series (manufactured using TSMC’s 4nm process).

Regarding memory capacity, the iPhone 15 Pro series could see an upgrade from 6GB to 8GB, while the iPhone 15 and iPhone 15 Plus might retain 6GB.

Additionally, it’s rumored that the iPhone 15 series’ ultra-wideband chips will all be upgraded to U2 chips, with the manufacturing process transitioning from the previous generation U1 chip’s 16nm to a 7nm process; this is expected to enhance the energy efficiency performance through this improvement.

In terms of battery life, there’s speculation that the entire iPhone 15 series will adopt ‘stacked batteries’ to enhance endurance. The speculated battery capacities for the four models are as follows: iPhone 15 (3877mAh), iPhone 15 Plus (4912mAh), iPhone 15 Pro (3650mAh), and iPhone 15 Pro Max (4852mAh).