Touch Panel Cover Plate Micro Drain Liquid Removal
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Solution Overview
Problem
Current touch control panels, such as optical finger mice, experience reduced sensing efficiency due to blurring or decreased detection of fingerprints when a user's finger is moistened with water or sweat, as the liquid components alter the refractive index.
Innovation Solution
A portable interactive electronic apparatus with a touch control panel featuring a cover plate having a first surface for sensing and a second surface with micro drains formed by etching scratches for leading out liquid components via capillarity or gravity, preventing interference and improving detection clarity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the touch control panel uses a smooth cover plate surface for fingerprint detection, then the detection sensitivity is improved, but liquid components (water, sweat) cause refractive index variations that blur fingerprint images and reduce sensing efficiency
Solution Approach 1:
The cover plate surface is segmented into two distinct functional areas: a first surface area optimized for fingerprint sensing and a second surface area with micro drains for liquid removal. This segmentation allows each area to perform its specific function without interfering with the other, resolving the contradiction between maintaining detection sensitivity and preventing liquid interference.
Solution Approach 2:
Different regions of the cover plate are given different local properties: the first surface area maintains a smooth, optically uniform surface for high-quality fingerprint detection, while the second surface area incorporates micro drains with specific geometries (etching scratches, grooves, or holes) that promote liquid drainage through capillarity or gravity. This local differentiation allows the cover plate to simultaneously achieve both fingerprint detection sensitivity and liquid rejection.
2Object-affected harmful factors
If micro drains are added to the cover plate to remove liquid components, then liquid interference is reduced, but the device structure becomes more complex
Solution Approach 1:
The micro drains in the second surface area create a porous or channelled structure that leverages capillary action and gravity to automatically drain liquid components. This approach uses the inherent properties of the modified surface geometry rather than requiring additional active components, pumps, or heating elements, thereby reducing overall device complexity while effectively removing liquid interference.
Solution Approach 2:
The micro drain structure enables the cover plate to self-regulate liquid removal through passive capillary forces and gravity, without requiring external power sources, control systems, or maintenance. The etching scratches, grooves, or holes automatically channel liquids away from the sensing area, allowing the device to maintain optimal performance through self-service liquid management.
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
The apparatus effectively removes liquid components, ensuring clear fingerprint detection and enhanced sensing efficiency even when the user's finger is moistened, thereby maintaining accurate touch control operations.
Implementation Method 1
the second surface area comprises micro drains formed by etching scratches for leading the liquid components out from the cover plate by capillarity or gravity
Implementation Method 2
the second surface area comprises micro drains formed by etching scratches for leading the liquid components out from the cover plate by capillarity or gravity
Data Source
AI summary
A portable interactive electronic apparatus includes a shell and a touch control panel having a cover plate. The cover plate includes a first surface area and a second surface area, and the touch control panel is positioned on the shell. The first surface area is utilized for sensing a touch of a user's finger, and the second surface area is utilized for leading liquid components out from the cover plate.