Touch Member Electrode Routing for Dual-Mode Sensing
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Solution Overview
Problem
Current touch panel technologies face challenges in efficiently sensing various types of touch events, such as those from body parts and electronic pens, in a simplified and accurate manner, often requiring complex structures and separate sensors for each input type.
Innovation Solution
A touch member and display device design featuring a touch sensing unit with a first electrode and a second electrode arranged in a specific pattern, connected by routing lines, and a touch driving circuit that operates in different modes to distinguish between body input and electronic pen input, allowing for simultaneous and accurate sensing of touch events.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate sensors are used for each input type (body touch and electronic pen), then sensing accuracy for each input type is improved, but device complexity increases
Solution Approach 1:
The patent implements a universal touch sensing structure where the same electrode pattern and sensing circuit can detect both body touches and electronic pen inputs. The touch sensing unit uses a single set of first and second electrodes that can sense both capacitive touches (body) and electromagnetic resonance (electronic pen), eliminating the need for separate sensor systems for each input type while maintaining accurate detection for both.
2Adaptability or versatility
If multiple separate sensing systems are implemented, then comprehensive touch event detection is improved, but manufacturing complexity increases
Solution Approach 1:
The patent merges the sensing capabilities for body touches and electronic pen inputs into a single integrated touch sensing unit. The first and second electrodes are arranged to simultaneously detect both capacitive coupling from body touches and electromagnetic resonance from electronic pens, consolidating what would traditionally require separate sensing systems into one manufacturable structure.
3Reliability
If complex routing lines are used to connect all electrodes, then complete electrical connectivity is improved, but routing line complexity and thickness increase
Solution Approach 1:
The patent segments the electrode connections by grouping them into distinct routing line sets. The first electrodes are connected to first routing lines and the second electrodes are connected to second routing lines, with each routing line connecting to dedicated touch pad areas. This segmentation simplifies the overall routing structure compared to fully interconnected designs while maintaining necessary electrical connectivity for dual-mode sensing.
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 design enables the display device to accurately recognize and differentiate between touch inputs from body parts and electronic pens, reducing complexity and thickness while enhancing sensing accuracy and precision.
Implementation Method 1
The touch panel determines whether a user's touch input is received, and, if any, finds the coordinates of the position of the touch input
Implementation Method 2
The touch panel may also determine whether a touch input using an electronic pen is received, and, if any, finds the coordinates of the position of the touch input
Data Source
AI summary
A touch member including: first and second electrodes in a touch sensor area; touch pad areas in a touch peripheral area; and routing lines in the touch peripheral area to connect the first and second electrodes with the touch pad areas, wherein the routing lines include a (1-1), (1-2), (2-1), and (2-2) routing line, the first electrode includes a (1-1) electrode having a first end not routing line, connected and a second end connected to the (1-1) routing line, and a (1-2) electrode having a first end connected to the (1-2) routing line and a second end not routing line connected, the second electrode includes a (2-1) electrode having a first end connected to the (2-1) routing line and a second end not routing line connected, and a (2-2) electrode having a first end not routing line connected and a second end connected to the (2-2) routing line.