Interactive Input System Illuminated Bezel Optical Fiber Nanostructures
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Solution Overview
Problem
Current interactive input systems with bezel light technology face challenges in accurately detecting and tracking input objects, particularly due to uneven light distribution and ambiguity in low-intensity zones, which affects the precision and reliability of object location determination.
Innovation Solution
The system employs an optical fiber housed within a bezel with nanostructures for diffusing light and a light redirection element, combined with imaging devices that receive continuous backlight illumination, to enhance light distribution and object detection accuracy. The optical fiber has a conduit with a filter and can include multiple segments or loops to prevent breakage, and modulates light in the time domain for improved detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional bezel light technology is used, then the system structure is simple, but the light distribution is uneven causing detection ambiguity in low-intensity zones
Solution Approach 1:
The optical fiber is equipped with nanostructures at specific locations along its length, creating localized light scattering regions. This allows different segments of the fiber to have different light emission characteristics, ensuring uniform overall illumination while preventing low-intensity zones that would cause detection ambiguity.
Solution Approach 2:
The patent introduces a light redirection element as an intermediary component between the optical fiber and the input area. This element redirects light from the fiber to improve distribution uniformity across the display surface, eliminating dark zones and enhancing detection reliability in previously low-intensity areas.
2Device complexity
If the optical fiber is made as a single continuous piece, then the structure is simple, but it is prone to breakage
Solution Approach 1:
The optical fiber is divided into multiple discrete segments rather than using a single continuous fiber. Each segment can be independently positioned and secured within the bezel structure, reducing the risk of complete system failure from a single break point while maintaining overall structural simplicity through modular design.
3Device complexity
If standard imaging devices are used without special illumination, then the system is simple, but object detection precision is reduced due to uneven lighting
Solution Approach 1:
The optical fiber provides continuous backlight illumination to the input area before and during the detection process. This preliminary lighting action ensures that the imaging devices always receive uniformly illuminated scenes, eliminating the need for complex post-processing correction algorithms and directly improving object location precision through enhanced contrast and reduced shadows.
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 configuration provides uniform and precise backlight illumination, enabling accurate detection and tracking of input objects with high precision, reducing ambiguity and improving the overall reliability of the interactive input system.
Implementation Method 1
an optical fiber housed within a bezel provides continuous backlight illumination to one or more input objects... The optical fiber has a conduit with a filter and can include multiple segments or loops to prevent breakage
Implementation Method 2
combined with imaging devices that receive continuous backlight illumination, to enhance light distribution and object detection accuracy
Implementation Method 3
at least two imaging devices having fields of view generally across the input area or encompassing at least a portion of the bezel
Data Source
AI summary
An interactive input system with bezel light around an input area provided by optical fiber is described. Two or more cameras have a field of view of at least a portion of the bezel. The optical fiber provides continuous backlight illumination to at least one input object. The optical fiber has at least one nanostructure therein for diffusing light. At least one light source provides a directional light to an end of the optical fiber.