The low-altitude economy is experiencing explosive growth in China, with a domestic market size hitting ¥670.25 billion in 2024. Projections show this figure will exceed ¥1.5 trillion in 2025 and surge to ¥2 trillion by 2030, marking a new era of urban air mobility and industrial innovation. Unmanned Aerial Vehicles (UAVs), as the core carrier of this burgeoning industry, are pivotal to its large-scale commercialization—yet UAV flight safety has long been constrained by the inherent limitations of traditional obstacle avoidance technologies, hindering the expansion of high-value use cases such as low-altitude logistics, urban inspection, and precision agriculture.

As a global pioneer in Single-Photon Direct Time-of-Flight (SPAD dToF) technology, visionICs has already achieved large-scale commercial application of its optical sensing solutions in consumer electronics including robot vacuum cleaners. Now, the company is leveraging its deep expertise in single-photon detection to break new ground in the UAV sector, with the launch of the VA6320 ToF sensor set to fortify the safety baseline for low-altitude flight and unlock the full potential of the low-altitude economy.

Industry Pain Points: Traditional Obstacle Avoidance Fails Complex Low-Altitude Scenarios

Current mainstream UAV obstacle avoidance solutions each suffer from critical shortcomings that make them ill-suited for the dynamic and unstructured environments of the low-altitude economy:

• Pure vision solutions: The market dominant, with benefits of low material cost, compact form factor and low power consumption, yet highly reliant on ambient light conditions and environmental textures.
• Infrared sensing solutions: Simple to implement and once widely adopted for downward ranging, but plagued by low measurement precision and a limited detection range.
• Radar solutions: Boasting robust anti-interference capability and light independence, yet hindered by large physical size and high costs, restricting their use to high-end intelligent driving scenarios rather than consumer-grade UAVs.

The most widely used pure vision solutions exhibit the most glaring flaws in real-world low-altitude operations. In low-illuminance conditions such as the blue hour and nighttime street illumination, target recognition speeds drop drastically, with tiny critical obstacles like thin wires and twigs often going undetected. When facing high-reflection or textureless surfaces—such as glass curtain walls and solid-color building facades—these solutions fail entirely, leading to the industry’s persistent pain point of "seeing but not perceiving". In complete darkness, UAVs are rendered inoperable, with return flights fraught with safety risks. These limitations stand in direct contradiction to the low-altitude economy’s core demands of safety and efficiency, acting as a major bottleneck to its scalable development.

visionICs VA6320: All-Weather SPAD dToF Sensing for Unmatched UAV Safety

The mature VA6320 ToF sensor, built on visionICs’ proprietary SPAD dToF technology, is a game-changer for UAV obstacle avoidance—equipping drones with a pair of all-weather "night vision eyes" that deliver precise environmental perception in even the most challenging low-altitude scenarios. Whether navigating the narrow gaps between dense urban high-rises, traversing rural forests and farmland, or operating in low-light or high-glare conditions, the VA6320 consistently captures accurate depth data, effectively safeguarding UAV flight safety and aligning perfectly with the diverse demands of the low-altitude economy.

Engineered specifically for the unique requirements of UAV flight, the VA6320’s core performance advantages set a new standard for optical sensing in unmanned systems:

1. Sub-millimeter Precision Depth Imaging: Integrating a 1/18-inch ToF imaging solution, a 40×30 pixel Backside-Illuminated (BSI) SPAD array, DTI process and Gen2 DSP depth processing module, the sensor outputs sub-millimeter precision depth images. This captures fine environmental details with unparalleled clarity, meeting the core demand for ultra-precise obstacle avoidance perception in UAV operations.
2. High-Speed Real-Time Detection: An innovative global shutter architecture paired with the MIPI CSI-2 interface supports a maximum frame rate of 60fps, enabling one-step 1200-point depth detection. The sensor rapidly captures dynamic changes in the flight environment, ensuring timely obstacle avoidance and eliminating the risk of response delays—critical for safe operation in fast-paced low-altitude scenarios.
3. Ultra-Compact Form Factor: Adopting an industry-leading 3D stacking structure, the VA6320 integrates sensor and logic wafers via wafer-level Cu-Cu hybrid bonding, achieving a significant reduction in chip footprint. This provides core technical support for the lightweight design of UAV sensing modules, precisely addressing the stringent payload weight constraints of consumer and industrial-grade UAVs.
4. All-Weather Ranging Performance: Delivering exceptional detection range across all lighting conditions, the sensor achieves a 25-meter range at night and an 8-meter detection range in high-brightness lighting conditions. Its superior sunlight resistance ensures reliable operation in complex lighting scenarios, from direct sunlight to twilight, eliminating the light dependency of traditional solutions.
5. Robust Anti-Interference Capability: Built-in with an Interference Suppression Modulator (ITS), the VA6320 optimizes TDC and logic modules to solve the photon pile-up problem. Combined with the Gen2 DSP’s high anti-noise capability, it effectively mitigates optical and electromagnetic interference, guaranteeing stable and consistent perception in the complex electromagnetic and lighting environments of urban low-altitude airspace.
6. Low-Power Operation: Integrated with a dynamic power management module, the sensor minimizes power consumption while sustaining high-performance operation. Specifically designed for low-power mobile devices, it meets the long-endurance operation needs of UAVs, expanding the range of applicable use cases and extending flight time for critical low-altitude economy applications.

The synergy of these cutting-edge features allows the VA6320 to overcome the fundamental limitations of traditional obstacle avoidance solutions. It delivers stable, high-precision detection independent of environmental texture and light conditions, completely resolving the industry’s long-standing "seeing but not perceiving" pain point and providing an unshakable safety guarantee for UAV operations in the most complex low-altitude scenarios.

Semiconductor Innovation Powers the Low-Altitude Economy’s Future

The launch of the VA6320—an application-optimized core component for the low-altitude economy—stems from visionICs’ founding mission: to deepen technological research in optical sensing and empower industrial development through semiconductor innovation. As a Nanjing Cultivated Unicorn Enterprise, Jiangsu High-Tech Enterprise and a global pioneer in SPAD dToF technology, visionICs has long adhered to its philosophy of "Opening the Window to Vision — Powered by Semiconductor Innovation", devoting itself fully to the R&D and industrialization of single-photon dToF technology since its establishment in 2018.

With a proven track record in consumer electronics, visionICs is now expanding its SPAD dToF technology into high-growth sectors including the low-altitude economy, industrial automation and embodied intelligence. The company’s R&D team, composed of internationally renowned high-level experts with decades of experience in optical sensing and semiconductor design, continues to push the boundaries of ToF imaging technology, driving constant iteration and innovation to meet the evolving needs of intelligent terminal scenarios.

Looking ahead, visionICs will further deepen its research on SPAD dToF imaging technology, conducting targeted technological iterations and product innovations for UAVs, service robots, humanoid robots and AR/VR devices. By delivering higher-quality, more reliable optical sensing core components, visionICs will empower the intelligent upgrading of diverse industries across the low-altitude economy and beyond, driving Made-in-China to advance steadily toward higher precision, greater efficiency and more sustainable development. As the low-altitude economy takes flight, visionICs’ SPAD dToF technology is set to be the invisible "intelligent eye" guiding its safe, scalable and innovative growth—redefining what’s possible for unmanned flight in the urban airspace of tomorrow.