Touch Electrode Code Patterns for Display Light Reflectance
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Solution Overview
Problem
Existing display devices face challenges in improving the recognition rate of code patterns for touch input systems, particularly due to high light reflectance on the display panel.
Innovation Solution
A display device with a touch input system that incorporates a mesh structure of touch electrodes, code patterns formed by covering parts of the touch electrodes with predetermined code shapes, and light-blocking patterns to reduce light reflectance and enhance pattern recognition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If code patterns are formed on touch electrodes to enable touch input recognition, then touch input functionality is achieved, but light reflectance increases which reduces pattern recognition accuracy
Solution Approach 1:
The touch electrode is divided into multiple segments with different code patterns (e.g., first code pattern, second code pattern, third code pattern) formed on different regions. This segmentation allows the system to provide diverse touch input recognition while managing light reflectance characteristics across different zones of the electrode structure.
Solution Approach 2:
Different regions of the touch electrode are assigned different code patterns with varying light-blocking properties. The first code pattern, second code pattern, and third code pattern are selectively formed on different portions of the electrode to optimize both recognition accuracy and reflectance control in specific local areas.
2Measurement precision
If multiple code patterns are formed on touch electrodes to improve touch input recognition, then recognition accuracy improves, but device complexity and manufacturing difficulty increase
Solution Approach 1:
Multiple code patterns (first code pattern, second code pattern, third code pattern) are integrated onto a single touch electrode structure. This merging approach consolidates what would otherwise require separate components, reducing overall device complexity while maintaining the ability to provide multiple recognition patterns for accurate touch input detection.
Solution Approach 2:
The touch electrode is designed to perform multiple functions simultaneously: it serves as the capacitive sensing element and also carries multiple code patterns (first, second, and third patterns) for different recognition purposes. This multi-functionality eliminates the need for separate recognition components, simplifying the overall device structure.
3Measurement precision
If code patterns cover large areas of touch electrodes, then pattern visibility and recognition improve, but capacitive sensing performance deteriorates
Solution Approach 1:
Code patterns are selectively formed on specific regions of the touch electrode rather than covering the entire surface. The first code pattern, second code pattern, and third code pattern are positioned on different local areas, ensuring that sufficient electrode surface remains exposed to maintain capacitive sensing performance while providing adequate pattern visibility for recognition.
Solution Approach 2:
The electrode surface is segmented into patterned regions and non-patterned regions. By dividing the electrode into zones with code patterns and zones without patterns, the system maintains the capacitive sensing functionality in non-patterned areas while providing pattern visibility in patterned areas for accurate recognition.
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 and efficient touch input by improving the recognition rate of code patterns and reducing power consumption and complexity in the driving process.
Implementation Method 1
a plurality of touch electrodes disposed between the plurality of emission areas to sense a touch by capacitive sensing
Implementation Method 2
the plurality of code patterns and the plurality of light-blocking patterns comprise an inorganic or organic black pigment absorbing infrared or ultraviolet light
Data Source
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AI summary
The present invention relates to a display device (10) capable of performing a touch input by a touch input device (20), and a touch input system including the same. According to an embodiment of the invention, a display device (10) comprising a display unit (DU) comprising a plurality of emission areas (EA1, EA2, EA3, EA4), a plurality of touch electrodes (SEN) disposed between the plurality of emission areas (EA1, EA2, EA3, EA4) to sense a touch, a plurality of code patterns (CP) formed by covering a part of a front surface of at least one of the plurality of touch electrodes (SEN) with a predetermined code shape, and a plurality of light-blocking patterns (DPd) formed on at least one of the plurality of touch electrodes (SEN) on which the plurality of code patterns (CP) is not formed, to block light, wherein the plurality of light-blocking patterns (DPd) is formed by covering at least one of a front surface and side surfaces of the at least one touch electrode (SEN) with a predetermined pattern shape.