Pointer Detection Using Quantum Dot Optical Signatures
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Solution Overview
Problem
Existing interactive touch systems face challenges in accurately identifying and distinguishing between different pointers, particularly in multi-user large-screen interfaces, where efficient pointer detection and management are crucial for maximizing screen real estate and user interaction.
Innovation Solution
The system employs a touch area with emitters emitting light, detectors to capture light intensity, refraction, and reflection properties, and a processing structure to determine the distinct optical properties of pointers, which can include quantum dot materials, to identify and track pointers based on their unique light interaction profiles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple pointers are used in a multi-user large-screen interface, then user interaction capability is improved, but pointer identification and differentiation becomes more difficult
Solution Approach 1:
The patent applies color changes by incorporating quantum dot materials with distinct optical properties into different pointers. These quantum dots emit or absorb light at specific wavelengths, creating unique optical signatures for each pointer. The imaging device captures these optical properties, enabling automatic differentiation and identification of multiple pointers simultaneously in use, thus resolving the difficulty of pointer identification in multi-user environments.
Solution Approach 2:
The patent changes physical parameters of the pointers by incorporating materials with distinct optical properties, specifically quantum dot materials that respond differently to light. Each pointer is characterized by unique optical parameters such as light absorption spectra, emission wavelengths, or refractive indices. The system measures these optical parameters to identify and differentiate between multiple pointers, enabling accurate pointer tracking and user attribution in large-screen interfaces.
2Measurement precision
If optical detection methods are used to identify pointers, then pointer identification accuracy is improved, but system complexity increases
Solution Approach 1:
The patent replaces mechanical or manual pointer identification methods with optical detection using imaging devices. Instead of requiring physical tags, codes, or manual configuration on each pointer, the system uses quantum dot materials that passively provide optical signatures. The imaging device captures these optical properties and the processing structure automatically identifies pointers based on measured optical parameters, eliminating complex mechanical identification mechanisms while achieving high accuracy.
Solution Approach 2:
The patent implements self-service by incorporating quantum dot materials that inherently provide identification information through their optical properties. Each pointer automatically presents its unique optical signature when illuminated, without requiring active components, power sources, or manual configuration. The imaging device and processing structure simply need to capture and analyze the passive optical response, significantly reducing system complexity while maintaining high identification accuracy.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables precise identification and tracking of pointers, allowing for effective management of user interactions and maximizing screen usage without impacting other users, enhancing collaboration and individual workspaces in interactive touch systems.
Implementation Method 1
a plurality of emitters on a periphery of the touch area; the emitters emitting an intensity of light into the touch area
Implementation Method 2
determine the distinct optical property from the at least one detector signal. The distinct optical property may reduce the light intensity passing therethrough
Implementation Method 3
The distinct optical property may comprise a quantum dot material. For each pointer, the quantum dot material may emit a different frequency of light than the light of the emitters in response to the light from the emitters
Data Source
AI summary
The present invention relates to a method and system for determining an optical property of a pointer used in an interactive touch system. The interactive device having a touch area; a plurality of emitters on the periphery of the touch area; the emitters emitting an intensity of light into the touch area; a plurality of pointers having a distinct optical property responsive to the light; at least one detector having a field of view of the touch area. The processing structure, in communication with the emitters and the at least one detector, executes instructions from a memory to: transmit an emitter signal to at least one of the emitters initiating emission of light at the first frequency; receive at least one detector signal from the at least one detector; and determine the distinct optical property from the at least one detector signal.