Touch Electrode Code Patterns Reduce Reflectance
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Solution Overview
Problem
Current display devices face challenges in accurately recognizing touch input patterns due to high reflectance and complexity in calculating touch coordinates, leading to inefficiencies and increased manufacturing costs.
Innovation Solution
A display device with a touch input system that incorporates code patterns and light-blocking dummy patterns on touch electrodes, featuring varying thickness and inclinations, which reduces reflectance and enhances pattern recognition without complex calculations, using a mesh structure and transparent or semi-transparent light-blocking members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If code patterns are formed on touch electrodes to enable touch input recognition, then touch input accuracy is improved, but reflectance increases causing recognition errors
Solution Approach 1:
The patent applies different properties to different regions of the touch electrode structure. The code patterns are formed with specific thickness and material characteristics in certain areas, while light-blocking dummy patterns are strategically placed in other areas. This local differentiation allows the code patterns to be recognizable for touch input while the dummy patterns block reflected light that would cause recognition errors, thus resolving the contradiction between improving recognition accuracy and reducing reflectance interference.
2Measurement precision
If complex calculation methods are used to determine touch coordinates, then positioning accuracy is improved, but processing time and system complexity increase
Solution Approach 1:
The patent uses optical code patterns that are directly readable by the touch input device, eliminating the need for complex mathematical calculations to determine touch coordinates. The code patterns act as visual references that can be directly captured and decoded, simplifying the coordinate determination process while maintaining accuracy. This approach replaces complex computational methods with a more straightforward optical recognition system.
3Difficulty of detecting and measuring
If code patterns with high light-blocking rate are used to improve recognition, then pattern detectability is improved, but more touch electrodes are affected reducing active sensing area
Solution Approach 1:
The patent divides the touch electrode structure into functionally distinct segments: code patterns in specific regions for recognition purposes, and light-blocking dummy patterns in other regions. This segmentation allows the code patterns to have high light-blocking rates for improved detectability, while the dummy patterns are strategically positioned to block reflected light without interfering with the active sensing areas. The segmentation enables each region to optimize its function without compromising the overall system performance.
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 accurate touch input based on precise coordinate data generation, reduces power consumption, and simplifies the driving process while increasing the recognition rate and accuracy of touch input patterns.
Implementation Method 1
a plurality of light-blocking dummy patterns formed on some of the plurality of touch electrodes on which the plurality of code patterns is not formed
Data Source
AI summary
A display device includes a display unit including a plurality of emission areas, a plurality of touch electrodes that sense a touch, a plurality of code patterns that cover a part of a front surface of at least one of the plurality of touch electrodes, and a plurality of light-blocking dummy patterns formed on some of the plurality of touch electrodes on which the plurality of code patterns is not formed. Each of the touch electrodes includes at least one portion disposed between adjacent emission areas among the plurality of emission areas. A thickness of the plurality of code patterns is different from a thickness of the light-blocking dummy patterns, and a light-blocking rate of the plurality of code patterns is different from a light-blocking rate of the light-blocking dummy patterns.