Beam Transmitter Switching Infrared and Visible Light for Touch Interaction
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Solution Overview
Problem
Current touch display technologies are unable to effectively combine remote and proximal interaction modes, leading to inaccurate recognition and user experience issues due to the inability to switch between these interaction types seamlessly.
Innovation Solution
A beam transmitter with a main body, first and second light sources emitting infrared and visible light respectively, and a control module that switches between projection states based on a touch sensor's state, allowing for both remote and proximal interaction modes, enabling automatic switching according to user needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single light source is used for both remote and proximal interaction, then device complexity is reduced, but the ability to provide accurate remote interaction and comfortable proximal interaction cannot be simultaneously achieved
Solution Approach 1:
The patent divides the light source system into two independent light sources: a first light source (infrared) for proximal interaction and a second light source (visible) for remote interaction. This segmentation allows each light source to be optimized for its specific function, resolving the contradiction between adaptability and device complexity by providing mode-specific optimization without requiring a complex multi-functional single source.
Solution Approach 2:
The beam transmitter is designed with multi-functionality by incorporating both infrared and visible light sources, enabling it to perform both proximal and remote interaction modes. The control module manages the switching between functions, allowing the device to adapt to different interaction scenarios while maintaining a unified device structure, thus achieving versatility without proportionally increasing complexity.
2Measurement precision
If visible light is used for proximal interaction, then interaction accuracy is improved, but eye damage risk increases
Solution Approach 1:
The patent applies different light qualities to different interaction modes: infrared light with specific wavelengths (700-1000nm) is used for proximal interaction to avoid eye damage while maintaining sufficient detection accuracy, and visible light is used for remote interaction where high brightness is needed. This local quality differentiation resolves the contradiction by optimizing the light properties for each specific use case.
Solution Approach 2:
The patent converts the potential harm of visible light (eye damage) into a beneficial design choice by using infrared light for proximal interaction. Infrared light at the specified wavelengths is invisible to humans and does not cause eye damage, yet still provides sufficient interaction accuracy. The control module ensures infrared is used only when appropriate, turning a potential limitation into a safety advantage.
3Ease of operation
If automatic mode switching is implemented, then user experience is improved, but control system complexity increases
Solution Approach 1:
The control module implements automatic mode switching by detecting interaction distance or user input state and automatically selecting the appropriate light source. This feedback mechanism improves ease of operation by eliminating manual mode selection, while the switching logic keeps control complexity manageable through simple state-based decision making rather than complex algorithms.
Solution Approach 2:
The system performs self-service by automatically determining the appropriate interaction mode and activating the corresponding light source without user intervention. The control module monitors system state and autonomously manages light source selection, reducing the operational burden on users while maintaining straightforward control architecture through predefined switching criteria.
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 solution enhances user experience by enabling seamless switching between remote and proximal interaction modes, improving accuracy and reducing the risk of misoperation, while also reducing eye damage from laser light by using infrared for proximal interactions.
Implementation Method 1
a first light source disposed on the main body and configured to emit infrared light and a second light source disposed on the main body and configured to emit visible light
Data Source
AI summary
A beam transmitter and an optical touch display system are disclosed. The beam transmitter includes a first light source, a second light source, a power supply component, a touch sensor, and a control module. The beam transmitter includes a first projection state and a second projection state. The control module is respectively connected to the power supply component, the touch sensor, the first light source, and the second light source, and the control module controls the beam transmitter to switch between the first projection state and the second projection state according to a state of the touch sensor.