45‐1: Status and Prospects of microLED Displays

Abstract

MicroLED is a new, self-emissive display technology. It offers unique features that could disrupt the display market as well as trigger significant changes in the supply chain. The authors have thoroughly analyzed the microLED industry landscape, including microLED's technological status and its strengths and weaknesses for all major display applications.

High performance color‐converted micro‐LED displays

“…Micro‐LED display is expanding rapidly in recent years because of its outstanding features such as low power consumption, nanosecond response time, long lifetime, high dynamic range, and wide color gamut . However, the high‐yield mass transfer process of micro‐LEDs from semiconductor wafer to glass substrate remains a challenge . To achieve full‐color micro‐LED displays, the most commonly used method is to grow red, green, and blue (RGB) micro‐LEDs on different wafers, and then assemble them into matrices on the same thin‐film transistor (TFT)‐based glass substrates through mass‐transfer, which requires precise alignment for each pixel.…”

“…[1][2][3][4] However, the high-yield mass transfer process of micro-LEDs from semiconductor wafer to glass substrate remains a challenge. 5,6 To achieve full-color micro-LED displays, the most commonly used method is to grow red, green, and blue (RGB) micro-LEDs on different wafers, and then assemble them into matrices on the same thin-film transistor (TFT)-based glass substrates through mass-transfer, which requires precise alignment for each pixel. Moreover, the light emission efficiency and degradation rate of RGB micro-LEDs are different; as a result, it may need complicated driving circuit to maintain the color rendering index during operation.…”

11‐3: Overlooked Challenges for microLED Displays

“…Finally, microLEDs could allow the integration of sensors and circuits, enabling thin displays with embedded sensing capabilities such as fingerprint identification and gesture control. MicroLED displays are therefore promising for a variety of consumer applications such as wearable, Augmented Reality, Smartphone, TV etc [1].…”

25‐1: Invited Paper: Achieving high uniformity and yield of 200 mm GaN‐on‐Si LED epiwafers for micro LED applications with precise strain‐engineering

“…In addition, they can also deliver a wider color gamut, orders of magnitude higher brightness for readability even in sunlight, improved lifetime, ruggedness, environmental stability and most important for mobile devices significantly reduced power consumption. Furthermore, there are a lot of system-level advantages such as micro LED displays allowing the integration of sensors and circuits, enabling thin displays with embedded sensing capabilities such as fingerprint identification and gesture control [1]. For some applications, like augmented reality (AR), the technology even has enabling capability.…”