Touch Screen Ripple Detection Using Grid Plate Imaging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional methods for detecting ripples in touch screens, such as capacitive touch screens with flexible film structures, are subjective and prone to incorrect results due to manual comparison with standard samples, affecting product yield and quality control.
Innovation Solution
A detection method using a detection plate with a regular array of grids is imaged onto the touch screen at a predetermined angle, allowing for intuitive and accurate determination of ripples by observing curved grid lines, with optional quantitative measurement of ripple width by counting grids within the curved portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual comparison with standard sample is used for ripple detection, then the detection method is simple to implement, but the detection accuracy is low and subjective errors occur
Solution Approach 1:
A detection plate with grid patterns is introduced as an intermediary tool between the inspector and the touch screen. The grid plate is placed at a predetermined angle (e.g., 45 degrees) relative to the touch screen, creating a visual interference pattern that amplifies and makes ripples objectively detectable through systematic grid distortion analysis rather than subjective visual inspection
Solution Approach 2:
The detection method transitions from direct two-dimensional visual inspection of the touch screen to a three-dimensional angular arrangement where the grid plate is positioned at a specific angle to the touch screen surface. This angular dimension creates optical path differences that magnify ripple effects, transforming subtle surface irregularities into detectable grid line distortions
2Measurement precision
If highly specialized testing personnel are trained to perform manual inspection, then detection accuracy may improve, but the productivity and cost increase
Solution Approach 1:
The detection plate is designed to be self-explanatory and self-calibrating. When placed at the predetermined angle, it automatically generates the interference pattern needed for detection without requiring operator skill or calibration. Any inspector can use the tool by simply placing it at the correct angle and observing the grid pattern, making the detection process self-service and eliminating the need for specialized training
Solution Approach 2:
The grid plate uses high-contrast visual patterns (typically black grids on white background or vice versa) that create easily distinguishable interference patterns when viewed at the predetermined angle. The visual contrast and pattern distortion provide immediate, unambiguous indication of ripple presence, allowing any inspector to quickly and accurately detect defects without extensive training
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
Enhances detection accuracy and prevents incorrect determination of touch screen quality, ensuring only qualified products enter the market by providing a systematic and objective method for ripple inspection.
Implementation Method 1
placing the surface of the detection plate at a predetermined angle with respect to a surface of one side of the touch screen where the a glass plate is located, such that the grid lines on the detection plate are imaged on the touch screen
Data Source
AI summary
A detection method for detecting ripples of a touch screen, and a detection plate and a detection assembly used in the method are disclosed by embodiments of the present invention, the detection method comprising steps of: manufacturing a detection plate, one surface of which is provided with a plurality of grids arranged in a regular array, which grids are formed by intersecting a plurality of grid lines extending in a first direction and a plurality of grid lines extending in a second direction; placing the surface of the detection plate at a predetermined angle with respect to a surface of one side of the touch screen where the a glass plate is located, such that the grid lines on the detection plate are imaged on the touch screen; and observing grid lines imaged on the touch screen, and determining the existence of ripples at a position of the touch screen corresponding to a curved portion of the imaged grid lines in case of the curved portion of the imaged grid lines. According to the embodiments of the invention, conditions of the ripples on the touch screen can be determined intuitively and easily according to curved conditions of the grid lines imaged on the touch screen, by imaging the grid lines on the detection plate onto the touch screen, such that the accuracy of detection is enhanced.