Display Touch Electrodes with Edge Code Patterns for Precise Coordinate Sensing
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Solution Overview
Problem
Current display devices face challenges in accurately sensing touch inputs, particularly when using a user's body parts, as they lack precise mechanisms to differentiate and accurately determine touch coordinates, leading to potential errors and inefficiencies.
Innovation Solution
Incorporating a display device with a touch sensing unit featuring a plurality of touch electrodes and code patterns formed in a predetermined planar code shape at the edge areas of the display panel, which are sensed by a touch input device using infrared light reflection, allowing for precise detection of touch coordinates without complex computations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If touch electrodes are used to sense touch input, then touch sensing capability is provided, but measurement precision of touch coordinates deteriorates
Solution Approach 1:
The patent introduces code patterns as an intermediary element between the touch input device and the touch electrodes. These code patterns serve as reference markers that mediate the coordinate detection process, allowing the touch input device to accurately determine touch positions by detecting the code patterns and calculating relative coordinates, thereby improving measurement precision without complicating the touch sensing structure
Solution Approach 2:
The patent uses code patterns that are detected by the touch input device to create a reference coordinate system. By copying the known positions of code patterns and calculating offset values, the system can accurately determine touch coordinates without requiring complex sensor arrays, thus maintaining simple device structure while achieving high precision
2Measurement precision
If code patterns are formed at edge areas of display panel, then touch input accuracy is improved, but manufacturing complexity increases
Solution Approach 1:
The patent segments the code patterns into multiple distinct shapes arranged in specific configurations at the edge areas of the display panel. This segmentation allows each code pattern to be independently formed using existing manufacturing processes, reducing overall manufacturing complexity while maintaining high touch input accuracy through the collective information provided by multiple segmented patterns
3Measurement precision
If complex computations are used to determine touch coordinates, then measurement precision improves, but power consumption increases
Solution Approach 1:
The patent performs preliminary action by pre-arranging code patterns at known positions and pre-calculating their spatial relationships. The touch input device uses these pre-established reference points to determine touch coordinates through simple offset calculations rather than complex computations, thereby achieving high measurement precision with reduced power consumption
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
This solution enhances the accuracy of touch input recognition, reduces power consumption, and simplifies the driving process, enabling more precise and reliable touch input operations by using code patterns to identify touch positions and generate accurate coordinate data.
Implementation Method 1
code patterns formed in a predetermined planar code shape at the edge areas of the display panel, which are sensed by a touch input device using infrared light reflection
Data Source
AI summary
A display device includes: a display unit including a plurality of light emission areas; a plurality of touch electrodes disposed between the plurality of light emission areas to sense a touch; and a plurality of code patterns formed between the plurality of light emission areas in a predetermined planar code shape, wherein code patterns, which indicate preset direction designated position codes, are repeatedly disposed in an outermost area in at least one direction of a touch sensor area in which the plurality of touch electrodes are arranged.