Market Context — Why This Technology, Why Now

The escalating demand for energy harvesting solutions is driven by the proliferation of billions of IoT devices, the imperative for sustainable energy, and the rising cost of manual maintenance. Industries are seeking autonomous power sources to reduce operational expenditures and environmental impact. This technology aligns perfectly with these trends, offering a robust, scalable solution for self-powered electronics, critical for smart cities, industrial automation, and remote monitoring applications globally.

Key Competitive Advantages
01

Maximize Triboelectric Output: Increases triboelectric generator output by up to 20% compared to conventional methods by optimizing ionic liquid concentration in the film substrate resin.

02

Maintain Superior Mechanical Properties: Preserves the film's inherent flexibility and durability with minimal ionic liquid addition, enabling easy integration into existing manufacturing processes.

03

Secure Market Exclusivity: Establishes a strong, defensible market position, having overcome 9 prior art references and successfully addressed office actions during prosecution.

Market Opportunity
IoT Sensor Devices
$1.0B–$2.0B globally (AI est.)
The rapid increase in sensor installations in challenging environments like factory equipment monitoring, environmental observation, and infrastructure management creates a strong demand for battery-free, autonomous power sources.
Industrial IoT sensor manufacturers Smart infrastructure solution providers Environmental monitoring system developers
Wearable Devices
$0.5B–$1.5B globally (AI est.)
As smartwatches and health monitoring devices become smaller and lighter, power solutions that eliminate charging hassles and enable continuous operation significantly enhance user experience.
Smartwatch and fitness tracker OEMs Medical wearable device manufacturers Consumer electronics innovators
Smart Factory
$500M–$750M globally (AI est.)
With the increasing adoption of wireless sensors on production lines, technology that harvests power from ambient energy sources like vibration and pressure contributes to reduced wiring costs and improved system flexibility.
Industrial automation equipment suppliers Factory IoT platform developers Manufacturing process optimization firms
IP Defensibility — Why Competitors Can't Replicate This
What This Patent Covers

This patent broadly protects the core technology of an electret film containing ionic liquid at a specific concentration (0-50 ppm) within a film substrate resin, ensuring enhanced triboelectric output while maintaining mechanical properties. Its robust claims, established through successful prosecution against nine prior art references, provide a strong, defensible market position.

Competitive White Space

White space exists in developing specific device architectures that optimize energy harvesting from diverse environmental sources, or in combining this electret film with other energy harvesting technologies for hybrid power solutions. Further IP could also be built around advanced manufacturing techniques for large-scale, complex film geometries.

Economic Impact
~$100K/year estimated operational cost reduction per facility (est.)
estimated ROI · USD · AI analysis
ROI Calculation Logic

Applying this technology to IoT sensor devices could halve battery replacement frequency. For example, 1,000 sensors requiring 2 battery changes annually, with each change costing ~$100 (AI est.) for battery and labor, totals ~$200K (AI est.) in annual costs. This technology could reduce replacement frequency by 50%, saving ~$50K (AI est.) in battery costs and ~$50K (AI est.) in labor, for a total operational cost reduction of ~$100K/year (AI est.).

Speed to Market
4× faster than in-house development
Developing similar technology in-house could take approximately 3.5 years, involving ionic liquid selection, optimal concentration discovery, film manufacturing process establishment, and evaluating both mechanical properties and power generation performance. This technology benefits from completed fundamental research by the university, establishing a robust technical foundation. Its high compatibility with existing film manufacturing processes means licensees could begin application development for commercialization in approximately 0.8 years, significantly accelerating time-to-market and securing early competitive advantage.
Competitive Positioning

X: Power Generation Efficiency & Sustainability
Y: Ease of Integration & Cost Performance

Business Models & Applications
📝 Technology Licensing Model
Granting licenses for this patent to companies manufacturing triboelectric generators or electret films, generating royalty revenue.
🤝 Joint Development & Customization Model
Collaborating to develop customized triboelectric generators or films based on this technology, tailored to specific applications or customer needs.
📦 Material Supply Model
Directly manufacturing and selling electret films incorporating this technology, supplying them as high-performance materials to generator and device manufacturers.
Adjacent Application Opportunities
🏥 医療・ヘルスケア
Autonomous Power for Wearable Biosensors
Flexible electret films could power patch-type biosensors or implantable medical devices. This could eliminate battery changes, reducing patient burden and improving continuous monitoring reliability by up to 2x.
🏭 スマートファクトリー
Wireless Anomaly Detection for Factory Equipment
This technology, generating power from manufacturing line vibrations or pressure, could be integrated into wireless anomaly detection sensors. This eliminates wiring, increases installation flexibility, and is expected to reduce maintenance costs by over 30%.
🏙️ スマートシティ
Long-Term Operation for Environmental Sensors
Integrating this technology into outdoor environmental sensors (temperature, humidity, PM2.5) could enable power generation from human movement and vibrations, in addition to solar/wind. This would allow for long-term data collection without battery replacement, extending operational life by 2-3x.
Integration Roadmap — Estimated 22-Month Deployment
Technology Validation & Application Design
Duration: 5 months
Conduct initial evaluation and design for integrating the electret film into existing or developing devices. This includes considering optimal film composition and form factors.
Prototype Development & Performance Evaluation
Duration: 8 months
Develop a triboelectric generator prototype based on the design, incorporating this technology. Conduct detailed evaluation and adjustments for target output performance, mechanical properties, and durability.
Mass Production Review & Market Launch
Duration: 9 months
Based on prototype evaluation, optimize manufacturing processes and conduct cost analysis for mass production. Develop a market launch strategy after final product reliability testing.
Technical Feasibility
This technology integrates ionic liquids at specific concentrations into existing film substrate resins, making it relatively easy to incorporate into current film manufacturing lines (e.g., extrusion molding, coating processes). This allows for adoption without significant capital investment, leveraging existing production infrastructure. Consequently, technical barriers to entry are low, facilitating rapid business deployment.
Success Scenario
If a licensee commercializes triboelectric generators incorporating this technology, it could extend IoT device battery replacement cycles by 2x. This is estimated to reduce annual operating costs by 30% and significantly enhance customer convenience. Furthermore, as a wire-free, autonomous sensor, it could open new installation locations and applications, expanding market share.
Patent Record
APPLICATION NO.
特願2021-207253
REGISTRATION NO.
7740701
FILING DATE
2021/12/21
GRANT DATE
2025/09/08
EXPIRATION DATE
2041/12/21
PATENT HOLDER
学校法人　関西大学
Examination History
2024年08月09日
出願審査請求書
2025年04月08日
拒絶理由通知書
2025年05月23日
意見書
2025年05月23日
手続補正書（自発・内容）
2025年08月19日
特許査定