Light Sensing Charge Track for Contactless Particle Positioning
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Solution Overview
Problem
Conventional particle processing devices struggle with accurately moving target particles to a predetermined target region along a predetermined path without the particles coming into contact with the external environment.
Innovation Solution
A particle accommodating device with a light sensing structure and a mating structure, utilizing a photoelectric layer to generate concentrated charges on a charge track for electrostatic adsorption, and a light driving device to form a DEP pattern for moving particles along the track.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional particle processing devices use electric fields to move particles, then particles can be moved to target regions, but particles may come into contact with the external environment causing damage
Solution Approach 1:
The patent introduces an insulating body with a charge track as an intermediary between the electric field and the particle. The charge track is formed by concentrating charges on a specific path through the insulating material, allowing the particle to follow a predetermined path without direct contact with electrodes or external environment. This mediator enables contactless transport while ensuring particle integrity.
Solution Approach 2:
The patent changes the spatial distribution parameter of charges by concentrating them on a specific track within the insulating body rather than using uniform electric fields. This is achieved by controlling the charge density distribution during formation, creating a localized charge track that guides particle movement along a predetermined path while maintaining contactless handling.
2Manufacturing precision
If charges are distributed uniformly in the photoelectric layer, then the structure is simple, but particles cannot be accurately positioned along a predetermined path
Solution Approach 1:
The patent applies local quality by concentrating charges specifically on a charge track within the insulating body rather than uniform distribution. The charge track has a localized high charge density along a predetermined path, while other regions have lower or zero charge density. This localized charge concentration enables accurate particle positioning and path control without requiring complex external control systems.
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
Enables precise positioning and movement of target particles without physical contact, preventing damage and enhancing accuracy in particle handling.
Implementation Method 1
The photoelectric layer is operable to generate a plurality of charges concentrated on the charge track
Implementation Method 2
enabling at least one of the particles to be moved and held onto the charge track in an electrostatic adsorption manner
Implementation Method 3
the light driving device is configured to push the target particle to move along the charge track by moving the DEP pattern
Data Source
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AI summary
A particle accommodating device (1) is configured to accommodate a liquid specimen (S) having a plurality of particles (P) therein. The particle accommodating device (1) includes a light sensing structure (11) and a mating structure (12) spaced apart from the light sensing structure (11). The light sensing structure (11) includes a substrate, an electrode layer formed on the substrate, a photoelectric layer (113) formed on the substrate, and an insulating body (114) that is formed on the photoelectric layer (113). The insulating body (114) includes a charge track (T). The photoelectric layer (113) is operable to generate charges concentrated on the charge track (T), such that a density of the charges concentrated on the charge track (T) is greater than a density of the charges on an outer surface of the photoelectric layer (113) for enabling at least one of the particles (P) to be moved and held onto the charge track (T) through electrostatic adsorption.