Human-computer interaction has emerged as a crucial technological direction in the era of the Internet and the Internet of Things. It has significantly accelerated the evolution of PCs and mobile devices, transforming them from basic button-based systems to smart, portable interfaces with touchscreens and styluses. In recent years, 3D sensing and micro-projection technologies have begun to redefine how we interact with machines, aiming to create a new third-generation human-computer interface beyond buttons and touch.
The current market for 3D sensing and intelligent interactive applications is divided into two main areas: input and output. The input side enables intelligent interaction through 3D depth perception, driving the integration of 3D technology into various smart hardware solutions. Examples include applications in e-commerce and home decoration, while future developments in VR and AR will further expand the possibilities by combining image processing, 3D modeling, and display technologies.
With the rise of smart speakers, there has been a growing demand for more efficient output methods. The embedded market is a key growth area, with a compound annual growth rate exceeding 30%. As intelligent audio evolves, the demand for interactive experiences continues to rise, leading to an increase in smart hardware capable of video display. Miniaturization technologies are also playing a major role in expanding the output market. Additionally, with declining eyesight, especially among children, the education sector is becoming a vital field for future human-computer interaction.
According to reports, the 3D sensing market is expected to grow from $1.328 billion in 2016 to $9.034 billion in 2022, at a compound annual growth rate of 38%. With the introduction of 3D camera technology by global leaders, face and gesture recognition are set to become the first breakthroughs, opening up massive market potential. Smart speakers, robots, smartphones, wearables, and AR devices are all part of this emerging trend. Similarly, the micro-projection market, particularly in embedded applications, is also experiencing rapid expansion. In the near future, 3D perception and micro-projection will become standard features in smart devices.
There are three main technologies used in 3D cameras: Time-of-Flight (TOF), structured light, and multi-angle imaging (also known as binocular stereo vision). TOF works by emitting modulated optical pulses and measuring the phase difference of the reflected signal to calculate depth. Structured light projects mathematically designed light patterns onto an object and captures images to extract 3D data, often requiring proprietary algorithms. Multi-angle imaging uses parallax to generate depth information but performs poorly in low-light conditions, limiting its use to specialized applications like robotics and certain VR systems.
In terms of performance, TOF offers fast response times and high accuracy, making it suitable for a wide range of applications. Structured light excels in low power consumption and compact size, which is why it's widely used in consumer electronics such as smartphones. Multi-angle imaging, while less accurate, still finds niche uses in specific fields.
Micro-projection technology includes LBS, DLP, and LCOS. Each has its own strengths. LBS stands out for its ability to project without focusing, offering high resolution and small size, making it ideal for mobile and wearable devices. DLP is currently the mainstream, while LCOS, though older, is expected to be phased out due to inferior performance.
Gool, a leading Chinese supplier of MEMS sensors, showcased its latest innovations at the 2017 Sensor China Shanghai Exhibition. Its products include MEMS microphones, 3D sensing modules, and micro-projection interactive systems. Gool’s micro-projection technology, based on LBS, offers advantages like no need for focus, high resolution, and low power consumption. These features make it ideal for integration into mobile phones, AR glasses, and other smart devices.
Gool’s success lies in its strong R&D foundation and manufacturing capabilities. According to Dr. Fang Huabin, the company focuses on innovation and long-term development rather than just mass production. This strategy allows Gool to stay ahead of market trends and maintain a competitive edge in the rapidly evolving tech industry.
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