Laser Array Interconnect Layout for Shorter ToF Rise Time
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Solution Overview
Problem
Existing light-emitting devices used in Time of Flight (ToF) methods for measuring three-dimensional shapes face challenges in achieving a short rise time of light emission, which is crucial for high accuracy measurements.
Innovation Solution
A light-emitting device configuration that includes plural laser element arrays connected to respective driving units and interconnected by a connection wire, allowing for synchronized light emission and reducing the rise time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If plural laser element arrays are driven by respective plural driving units to increase light emission intensity, then light emission intensity is improved, but rise time of light emission becomes long due to delay of rise time of each laser element array
Solution Approach 1:
The patent merges multiple laser element arrays into a single array structure while maintaining the plurality of driving units. This consolidation eliminates the time delay associated with switching between separate arrays, allowing all laser elements to be driven simultaneously by their respective driving units. The result is high light emission intensity achieved through parallel operation of multiple driving units without the sequential delay that would occur with separate array switching.
2Loss of time
If a single laser element array is used to achieve short rise time, then rise time is improved, but light emission intensity becomes insufficient for high accuracy ToF measurements
Solution Approach 1:
The patent combines multiple driving units to drive a single laser element array simultaneously. This approach maintains the short rise time characteristic of a single array while achieving high light emission intensity through the combined output of multiple driving units operating in parallel. The simultaneous operation of multiple driving units ensures that the full light intensity is achieved without the time delay that would result from sequential activation.
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 enables a shorter rise time of light emission compared to systems using plural laser element arrays driven by separate units, thereby enhancing the accuracy of three-dimensional shape measurements.
Implementation Method 1
a connection wire that interconnects terminals of the plural laser element arrays, the terminals being connected to the plural driving units
Data Source
AI summary
A light-emitting device includes plural driving units; plural laser element arrays connected to the respective plural driving units; and a connection wire that interconnects terminals of the plural laser element arrays, the terminals being connected to the plural driving units.