Mini LED Touch Panel Embedded Transistors for Integration
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Solution Overview
Problem
Mini LED touch panels have limited integration and combination due to the plug-in connection method, resulting in insufficient touch interaction, and existing self-capacitance touch panels have complex structures and high costs.
Innovation Solution
Applying active-matrix touch scanning technology to mini LED touch panels, incorporating switching transistors and self-capacitance conductive layers within sub-pixels to form an embedded touch panel, where touch units sense capacitance changes and determine coordinates using a time-sharing method between display and touch scanning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If plug-in connection method is used for mini LED touch panels, then assembly flexibility is improved, but integration and combination are worsened resulting in insufficient touch interaction
Solution Approach 1:
The patent merges the touch sensor array with the mini LED display panel by integrating switching transistors, touch conductive layers, and capacitance sensing circuits directly into the display substrate. This consolidation eliminates the need for separate plug-in touch sensors, achieving unified integration that enables both display and touch functions within a single panel structure.
Solution Approach 2:
The display substrate is designed to serve dual purposes: displaying visual information through mini LED pixels and sensing touch inputs through integrated capacitance sensing circuits. The same substrate structure supports both display and touch functions, making the panel universal and eliminating the need for separate touch sensor assemblies.
2Measurement precision
If self-capacitance touch panel with separate lead for each touch electrode is used, then touch accuracy is improved, but device complexity and cost increase
Solution Approach 1:
The patent segments the touch sensing function into multiple independent capacitance sensing circuits, each responsible for detecting touch in a specific region. These segmented circuits share common signal processing pathways and can be controlled through multiplexed addressing lines, reducing the overall complexity compared to having completely separate leads for each electrode while maintaining individual touch detection accuracy.
Solution Approach 2:
The patent transitions from a one-to-one mapping between touch electrodes and leads to a many-to-one mapping by introducing time-multiplexed scanning. Instead of requiring separate continuous leads for each electrode, the system uses scanning control signals to sequentially activate electrodes in a matrix arrangement, reducing the number of physical leads while preserving touch detection capability.
3Ease of operation
If active-matrix touch scanning technology is applied to self-capacitance touch panels, then touch interaction is improved, but manufacturing process complexity increases
Solution Approach 1:
The patent combines the active-matrix scanning control circuitry with the existing display driver architecture. The same switching transistors and control lines used for displaying images are leveraged to control the touch scanning sequence, eliminating the need for entirely separate control systems and reducing manufacturing complexity while enabling sophisticated touch interaction.
Solution Approach 2:
The display driver circuit is designed to perform both display functions and touch scanning functions. The same transistor switches and control signals serve dual purposes: driving display pixels and controlling touch electrode activation sequences. This multi-functionality reduces the number of separate manufacturing processes needed while achieving advanced touch interaction capabilities.
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 approach improves integration and reduces complexity, enabling accurate touch point determination without ghost points and multi-touch functionality while minimizing additional manufacturing processes, thus enhancing the mini LED touch panel's interaction and integration.
Implementation Method 1
Each of the touch units includes a switching transistor and a touch conductive layer... the touch conductive layer is distributed within gaps between a plurality of corresponding sub-pixels
Implementation Method 2
Each of the sub-pixels includes a driving transistor and a mini LED lamp bead connected to each other
Data Source
AI summary
The present disclosure provides a light-emitting diode (LED) touch panel and its driving method and preparation method. Under switching transistors of touch units controlled by touch addressing lines, electric charges accumulated in a touch conductive layer are extracted into a touch reading line to determine touch-point coordinates, thereby embedding the touch units into sub-pixels of the mini LED touch panel to form a mini LED-based embedded touch panel.