This invention is an aid for the visually impaired that offers an error free identification of currency notes by using their physical dimensions and features in different view and scale. The device is a tactile card template made of polypropylene (PP) plastic, with tactile marks and patterns to identify a banknote. This solution uses the dimensional difference with tactile cues to identify the currency correctly.
While texture and color of the note is subject to wear and tear, the physical configuration and dimensions of the note remain the same. The tactile clarity of different shapes, textures and projections has been ideated and tested to derive the best possible markers for quick and accurate identification
Figure (1) A prototype of the device
Identifying currency notes remains a major challenge for visually impaired individuals, especially after demonetization introduced multiple similar-looking denominations with limited tactile features. Existing aids have become obsolete or ineffective, forcing users to rely on others for everyday transactions. There is a pressing need for a simple, low-cost, and reliable solution that enables independent currency identification and empowers visually impaired individuals in their daily financial activities.
- Lightweight and portable: the device is made from lightweight polypropylene (PP) plastic and its small size makes it very easy to carry
- Ease to use and accurate: the device relies upon the dimensions of the notes to determine their value, which makes it very accurate and intuitive to use
- Affordable: using PP plastic with injection molding techniques bring down costs
A working prototype has been created using lightweight polypropylene (PP) plastic via injection molding, making it durable, cost-effective, and suitable for mass manufacturing. The tactile markers (triangular, discontinuous lines, and semicircles) are designed to differentiate between denominations based on note length and width. The device includes a central live hinge, finger-grip holder, and Braille-compliant textures, and is compact (maximum size: 157 mm × 73 mm). The prototype has been evaluated through field use and user feedback, confirming its practical effectiveness.
The device has been developed and successfully tested with visually impaired users for its tactile clarity, ease of use, and accuracy in identifying all banknotes which were available for circulation in 2019 (Jun 2019- Jan 2020). Feedback has demonstrated reduced cognitive and physical load for users, and the product is ready for scalable production through injection molding. The design is stable and mature, qualifying the technology at Technology Readiness Level (TRL) 7 4 Pilot-scale system demonstration in an operational environment.
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The device empowers visually impaired individuals by enabling independent and accurate identification of banknotes without requiring Braille literacy or reliance on electronic devices. It supports dignified financial inclusion, improves daily living efficiency, and reduces dependence on others for currency handling. Designed to be affordable and easy to learn, this tactile solution promotes economic and social participation for underserved and marginalized populations.
- Personal Finance Accessibility: Enables the visually impaired to independently identify Indian banknotes during daily transactions.
- Assistive Aids for the Blind: Functions as a practical tool in mobility kits or assistive device kits for low-vision users.
- Banking and Financial Institutions: Can be distributed at banks or ATMs to assist visually impaired customers with cash handling.
- Education and Rehabilitation Centers: Useful in training visually impaired individuals on financial literacy and independent living skills.
Geography of IP
Type of IP
201921039792
535630