1. Solution Overview

1.1 Technical Challenges in Toilet Flush Control

Smart toilets and intelligent retrofit upgrades for conventional toilets have become dominant trends in the sanitary ware industry. However, flush control technology has long faced unresolved pain points. Traditional infrared (IR) sensor solutions exhibit significant blind spots when installed in the wide-angle ceramic body environment — human body proximity to the toilet bowl can easily cause signal loss or false triggering due to occlusion. Additionally, rapid changes in ambient lighting — such as bathroom light switches and sunlight through windows — can disrupt the normal operation of IR sensors, leading to "no-flush" or "random-flush" issues.

From a user experience perspective, different usage scenarios demand different flush trigger methods: standing urination calls for a kick or wave trigger without bending down, seated use requires automatic sensor-based flushing, and nighttime use demands consistent sensing sensitivity regardless of dim lighting. A single sensing approach struggles to meet these diverse requirements simultaneously.

1.2 The GIBO A3 Breakthrough

The GIBO A3 control module features dTOF (direct Time-of-Flight) laser ultra-sensing technology (Core Technology #2). Using the direct time-of-flight laser ranging principle, it emits nanosecond-level laser pulses and measures the reflected time difference to precisely calculate the distance and movement trajectory between the target object and the sensor. Unlike IR intensity-based detection, dTOF laser measures physical time rather than signal strength, making it fundamentally immune to interference factors that traditional IR solutions cannot overcome — ambient light changes, clothing color variations, and ceramic surface reflectivity differences.

The A3 module integrates both wave-sensing and kick-sensing dual trigger modes with intelligent dual-stage flush control logic, automatically adjusting flush volume based on usage scenarios. The wave mode suits standing urination — a hand wave above the toilet triggers flushing. The kick mode suits seated use — a foot approaching the toilet base sensing zone triggers flushing without bending or leaning. Both modes work collaboratively within a single module without mutual interference, covering all toilet flushing scenarios.

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2. Performance Specifications

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3. Key Features

3.1 dTOF Laser Precision Ranging

Equipped with a 940nm VCSEL laser emitter, the module uses direct time-of-flight measurement of nanosecond laser pulse round-trip time to achieve high-precision distance detection at ±1cm accuracy. The narrow laser beam (typical divergence angle ±5°) precisely illuminates designated sensing zones without diffusion, preventing false triggers from signal crosstalk. Class 1 eye-safe certification ensures complete safety for human exposure.

3.2 Wave & Kick Dual-Trigger Mode

Wave mode detects the dynamic trajectory of a hand quickly passing through the sensing zone with response time ≤0.2s. Kick mode detects the signal sequence of a foot lingering then departing from the sensing zone. Both modes trigger independently without mutual interference, covering all toilet flushing scenarios.

3.3 Zero Blind Spot Sensing

Because dTOF laser operates on time-of-flight rather than signal strength, sensing performance is unaffected by target color, material, or reflectivity. Whether the user wears dark clothing, a white bathrobe, or black slippers, the laser sensor maintains stable detection. Performance remains consistent under dim, bright, or backlit extreme lighting conditions, completely eliminating the sensor failure issues of traditional IR solutions in complex light environments.

3.4 Penetrates Water Mist & Stains

The laser beam can penetrate water mist, steam, and light stain coverage, maintaining stable detection performance even in high-humidity bathroom environments. Even when the sensing window is partially obscured by water droplets or dirt, normal laser emission and reception continue unaffected, significantly reducing after-sales complaints caused by dirty sensing windows.

3.5 Dual-Stage Water-Saving Flush

Flush volume automatically switches based on usage scenario: detecting standing urination triggers a half flush (2–3L), detecting seated use triggers a full flush (4–6L). The dual-stage flush strategy, while ensuring flushing effectiveness, saves approximately 30% water annually compared to constant-volume flush solutions, effectively reducing water expenses and environmental impact.

3.6 Ultra-Low Power Standby

Based on low-power multi-stable agile sensing technology (Core Technology #6), standby power consumption is as low as 25μA. The module operates in an intermittent sensing scan mode: executing one laser pulse detection every 200ms, rapidly entering low-power sleep when no target is detected. Overall battery life is improved by over 50% compared to traditional IR solutions. With DC 6V battery power, endurance reaches 18–24 months in a household scenario of 30 daily uses.

3.7 Anti-Fog Sensing Window Design

The sensing window features a nano-hydrophobic coating treatment — water droplets form spheres that quickly roll off the window surface rather than spreading into a water film, effectively maintaining optical path clarity. Paired with a built-in heating de-fogging circuit (optional), sensing performance is preserved even in winter shower environments with large temperature differences.

3.8 Multi-Position Installation Compatibility

The sensor probe supports horizontal, vertical, and angled installation positions, with configurable detection angle and distance parameters via firmware. Compatible with front-side toilet lid mounting, side-wall toilet body mounting, floor mounting, and other product form factors, providing maximum design flexibility for ODM customers.

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4. Application Scenarios

4.1 Integrated Smart Toilet OEM

For smart toilet manufacturers, the A3 module is embedded as the flush control core component within the toilet body. Wave and kick dual modes combined with automatic seat-leave sensing flush provide a complete multi-dimensional flush experience. The dTOF laser solution performs exceptionally well in the complex ceramic cavity environment of integrated toilets.

4.2 Conventional Toilet Smart Retrofitting

The A3 module upgrades traditional toilets to sensor-flush smart toilets. The module can be independently installed on the side or front of the toilet, battery-powered with no wiring needed, and retrofit cost is only a few hundred yuan. For rental users and older residences where smart toilet replacement is not feasible, this provides a cost-effective intelligent upgrade path.

4.3 Elderly-Friendly Toilet Flush Solution

For seniors with reduced waist and leg strength, bending to press the flush button is often difficult and dangerous. The A3 module's kick-sensing mode allows elderly users to trigger flushing simply by approaching with their foot — eliminating the need to bend down entirely. The wave-sensing mode also provides caregivers with a touch-free flush operation method, reducing cross-infection risk.

4.4 Premium Hotel Bathrooms

Boutique hotels and premium business hotels pursue touch-free bathroom experiences with a sense of technology. The dTOF laser sensing solution operates precisely even under dim nighttime lighting — guests never need to fumble for a flush button. The module supports OTA upgrades (via Bluetooth gateway), allowing hotel operations teams to remotely adjust sensing parameters and flush logic based on operational needs.

4.5 Child-Friendly Sanitary Ware

Children, limited by height and strength, often find traditional toilet flush buttons inconvenient. The A3 module's wave-sensing method is intuitive and easy — children need only wave their hand above the toilet to independently complete flushing, fostering good bathroom hygiene habits. Sensing distance can be adjusted during installation based on the child's height range.

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5. Compatible Products

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6. Patents & Technical Standards

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7. ODM Customization Services

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Data Source: Technical data sourced from GIBO official website (www.gibo.com.cn), enterprise EEAT knowledge base, and product specification documents. dTOF laser module performance data based on laboratory standard environment testing, Class 1 eye-safe certified.

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Related Resources: dTOF Laser Sensor Module | Sensor Flush Control Board | Ultra-Low-Power Control Module | Product Catalog | ODM Services

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Last Updated: 2026-06-14  |  GIBO  |  Sensor Faucet ODM Expert  |  www.gibo.com.cn

Core Technology Principle

The dTOF (direct Time-of-Flight) laser ranging principle is fundamentally different from conventional infrared intensity-based sensing. A 940nm VCSEL laser diode emits nanosecond-duration light pulses toward the target. A high-speed SPAD (Single Photon Avalanche Diode) array on the receiver side captures the reflected photons, and a precision time-to-digital converter (TDC) measures the round-trip flight time with picosecond resolution. Since the speed of light is constant, distance is calculated as d = c × t / 2. This direct physical measurement approach means the sensor output depends solely on the round-trip time of the laser pulse — not on target color, reflectivity, ambient light intensity, or any environmental optical factor. The result is consistent, reliable detection across all lighting conditions, surface materials, and installation environments.

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