Light-Emitting Device Switching Unit Placement
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Solution Overview
Problem
Existing light-emitting devices for 3D shape measurement have a long rise time of light pulses due to increased inductance between light-emitting units and driving units, which is not efficiently addressed by conventional configurations.
Innovation Solution
A light-emitting device configuration where the switching unit is placed on the opposite side of the driving unit relative to the light-emitting units, reducing the distance and inductance between them, thereby shortening the rise time of light pulses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a switching unit is provided between the light-emitting units and the driving unit, then the light emission can be controlled, but the distance between light-emitting units and driving unit increases, causing increased inductance and longer rise time
Solution Approach 1:
The patent applies dimensionality change by moving the switching unit from a linear position between the driving unit and light-emitting units to an opposite side position. This spatial rearrangement reduces the current path length and inductance while maintaining the switching function, effectively resolving the contradiction between speed (rise time) and device complexity.
2Speed
If the distance between light-emitting units and driving unit is shortened, then inductance is reduced and rise time is shortened, but the placement of switching unit becomes more constrained
Solution Approach 1:
The patent resolves the manufacturing constraint by transitioning from a linear one-dimensional arrangement to a two-dimensional or three-dimensional layout where the switching unit is positioned on the opposite side of the light-emitting units relative to the driving unit. This spatial reconfiguration enables shorter current paths while providing flexible placement options that facilitate manufacturing.
Data Source
AI summary
A light-emitting device includes: plural light-emitting units; a driving unit that drives the light-emitting units by supplying a current to the light-emitting units; and a switching unit that is provided on a side opposite to a side where the driving unit is provided relative to the plural light-emitting units and switches light emission of the plural light-emitting units.