Touch Unit Sub-Unit Segmentation for Accuracy
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Solution Overview
Problem
Current touch display panels have low touch accuracy due to only one electrode intersection point per touch unit, which prevents effective touch detection when regions outside the intersection point are touched.
Innovation Solution
The touch unit is designed with at least two sub-units on a base substrate, each having a first electrode and a second electrode with an initial insulation layer in between, and multiple intersection points, allowing for increased touch line connections to a control unit, enhancing touch detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If only one electrode intersection point is used per touch unit, then the device complexity is reduced, but the touch accuracy deteriorates
Solution Approach 1:
The touch unit is divided into multiple sub-units (first sub-unit, second sub-unit, etc.), each containing electrode intersection points. This segmentation allows the system to detect touch events at multiple discrete locations within a single touch unit, thereby improving touch accuracy without requiring a complete redesign of the electrode configuration
Solution Approach 2:
The patent introduces a spatial dimension by arranging multiple electrode intersection points in different positions (e.g., first intersection point, second intersection point) within each touch unit. This multi-point spatial arrangement enables the system to distinguish between touch events occurring at different locations, transforming a single-point detection system into a multi-point detection system
2Measurement precision
If multiple electrode intersection points are used per touch unit, then the touch accuracy is improved, but the manufacturing complexity increases
Solution Approach 1:
The touch display panel is divided into multiple touch units, each further divided into sub-units with individual electrode intersections. This hierarchical segmentation standardizes the structure, making it easier to manufacture through repetitive patterning processes while achieving multiple detection points per touch unit
Solution Approach 2:
The electrode configuration is designed to serve multiple functions: the first electrode and second electrode not only create intersection points for touch detection but also form touch driving lines and touch sensing lines that connect to control units. This multi-functionality reduces the need for separate components, simplifying manufacturing
3Adaptability or versatility
If multiple sub-units with multiple intersection points are implemented, then the touch detection capability is enhanced, but the number of connections to control unit increases
Solution Approach 1:
Multiple touch driving lines are merged into a single first touch line that connects to the control unit, and multiple touch sensing lines are merged into a single second touch line. This merging reduces the number of separate connections while maintaining the ability to address individual sub-units through selective activation, thereby enhancing touch detection capability without proportionally increasing connection complexity
Solution Approach 2:
The control unit activates different sub-units in a periodic or sequential manner, applying driving voltages to different combinations of first electrodes and second electrodes at different time intervals. This temporal multiplexing allows the system to detect touch events at multiple intersection points using a reduced number of physical connections
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 increases the number of electrode intersection points and voltage-generating electrodes, enabling effective touch detection and improved accuracy by differentiating induced voltages from preset values, even when touched outside the primary intersection point.
Implementation Method 1
When a touch function of the touch display panel is implemented, the control unit may sequentially apply a driving voltage to each touch driving line. When a driving voltage is applied to a certain touch driving line, an induced voltage on each touch sensing line is collected.
Data Source
AI summary
The present disclosure provides a touch unit, a method for manufacturing the same and a touch display panel. The touch unit includes: at least two sub-units arranged in an array on a base substrate, each of the sub-units including: a first electrode and a second electrode formed on the base substrate, an initial insulation layer being formed between the first electrode and the second electrode, wherein an orthographic projection area of the first electrode on the second electrode is located within an orthographic projection area of the initial insulation layer on the second electrode, the first electrodes in each row of the sub-units are sequentially connected to form a first touch line, the second electrodes in each column of the sub-units are sequentially connected to form a second touch line, and each of the first touch lines and each of the second touch lines are connected to a control unit.