Touch Electrode Code Pattern Layout for Accurate Pen Positioning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current display devices face challenges in accurately determining position coordinates of touch input devices like electronic pens due to complex calculations and low recognition rates of position code patterns, leading to increased costs and power consumption.
Innovation Solution
A display device with a pixel structure featuring emission areas, touch electrodes, position code patterns, and light blocking patterns, where the position code patterns cover part of the touch electrodes in a specific shape and are larger than the light blocking patterns, allowing for accurate position coordinate determination without complex calculations, reducing costs and power consumption, and enhancing pattern recognition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If position code patterns are made larger to improve recognition rate, then the recognition rate increases, but the area occupied by patterns increases
Solution Approach 1:
The patent applies local quality by making position code patterns larger only in specific regions where recognition is critical, while keeping patterns in other regions at standard size. This allows the recognition rate to be improved in key areas without proportionally increasing the total area occupied by all patterns across the entire display surface.
2Measurement precision
If complex pattern recognition algorithms are used to improve position coordinate determination accuracy, then measurement precision improves, but device complexity increases
Solution Approach 1:
The patent segments the position code patterns into distinct geometric shapes (circles, squares, triangles, etc.) that can be easily identified and classified. By dividing the recognition task into simple shape identification rather than complex pattern analysis, the system achieves accurate position coordinate determination while keeping the recognition algorithm relatively simple.
Solution Approach 2:
Instead of using complex algorithms to interpret simple patterns, the patent inverts the approach by using simple, distinct geometric patterns that are inherently easy to recognize. The complexity is shifted from the algorithm to the pattern design, allowing accurate position determination with simpler processing.
3Measurement precision
If more position code patterns are added to improve position input accuracy, then measurement precision improves, but device complexity increases
Solution Approach 1:
The patent uses asymmetric geometric shapes (circles, squares, triangles, pentagons, hexagons) with distinct properties that can be easily differentiated. This asymmetric design allows a small number of patterns to provide high position input accuracy, as each shape's unique characteristics enable clear identification and classification, reducing the total number of patterns needed compared to using symmetric or less distinctive patterns.
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 solution enables efficient generation of position coordinate data for touch input devices with improved recognition rates of position code patterns, reducing costs and power consumption while simplifying the driving process.
Implementation Method 1
the plurality of position code patterns and the light blocking pattern include a black pigment that absorbs infrared or ultraviolet rays
Data Source
AI summary
A display device includes a pixel having a plurality of emission areas, a plurality of touch electrodes disposed between the plurality of emission areas to sense a touch, a plurality of position code patterns covering a partial front surface of at least one of the plurality of touch electrodes in a preset code shape, and a light blocking pattern disposed on front surfaces of the plurality of touch electrodes on which the plurality of position code patterns are not formed. A width or size of the plurality of position code patterns is greater than a width or size of the light blocking pattern.