Touch Display Panel Array for 3D Detection
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Solution Overview
Problem
Existing electric field type three-dimensional touch technologies are not suitable for large-sized display panels due to weak signal amplitude of sensing electrodes, resulting in insensitive touch, low accuracy, and inability to perform 3D touch functions effectively.
Innovation Solution
A touch display panel design featuring an array of n touch driving electrodes surrounded by touch sensing electrodes, connected to an integrated circuit that sends driving signals and receives sensing signal changes to determine touch positions, enabling accurate three-dimensional touch detection on large-sized panels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a driving electrode is placed in the middle with sensing electrodes around it (existing electric field type design), then the structure is simple and easy to manufacture, but the signal amplitude of surrounding sensing electrodes becomes weak on large-sized panels, resulting in insensitive touch and low accuracy
Solution Approach 1:
The patent divides the touch detection function into multiple independent driving electrodes arranged in an array, with each driving electrode having its own surrounding sensing electrodes. This segmentation allows each electrode pair to operate independently with strong signal amplitude, solving the weak signal problem on large panels while maintaining manufacturing simplicity through modular repetition.
Solution Approach 2:
The patent transitions from a single central driving electrode to a two-dimensional array of multiple driving electrodes. This dimensional change distributes the touch detection capability across the entire panel surface, ensuring strong signal amplitude throughout large areas while maintaining the simple surrounding sensing electrode configuration.
2Area of stationary object
If the display panel size is increased to medium or large sizes, then the coverage area and usability are improved, but the signal amplitude of sensing electrodes becomes weak, resulting in insensitive touch and inability to perform 3D touch functions
Solution Approach 1:
By segmenting the large display panel into multiple zones, each with its own driving and sensing electrodes, the patent ensures that each local zone maintains strong signal amplitude comparable to smaller panels. This segmentation allows large panel area while preserving touch sensitivity and enabling 3D touch functions across the entire surface.
Solution Approach 2:
The patent uses a two-dimensional array of driving electrodes to scale the touch detection system to large panel sizes. This dimensional approach allows the system to maintain strong electric field signals across large areas by distributing multiple signal sources throughout the panel, preventing signal weakening that would occur with a single central electrode.
3Measurement precision
If multiple touch driving electrodes are arranged in an array with sensing electrodes surrounding each, then touch accuracy and sensitivity are improved on large panels, but the number of electrodes and connections increases
Solution Approach 1:
The patent merges the functions of multiple driving electrodes and their surrounding sensing electrodes into a unified array structure that shares common connection pathways to the integrated circuit. This merging approach reduces the total number of independent connections required compared to completely separate electrode systems, while still providing multiple independent detection zones for high accuracy.
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 allows for sensitive and precise three-dimensional touch detection on large-sized display panels, enhancing user experience with improved touch accuracy and gesture recognition.
Implementation Method 1
a touch driving electrode TX... a plurality of touch sensing electrodes RX... the integrated circuit sends touch driving signals to the n touch driving electrodes to perform a touch scan
Implementation Method 2
the integrated circuit receives sensing signal change quantities of the plurality of touch sensing electrodes surrounding a same one of the n touch driving electrodes, to determine a touch position
Data Source
AI summary
The present disclosure provides a touch display panel, a touch display device, and a touch detection method. The touch display panel includes a base substrate, touch driving electrodes, insulated from each other and arranged in an array on the base substrate, and touch sensing electrodes, insulated from each other and surrounding each of the touch driving electrodes, that the touch driving electrodes are disposed in a same layer as the touch sensing electrodes; and an integrated circuit, that the touch driving electrodes and the touch sensing electrodes are electrically connected to the integrated circuit, the integrated circuit sends touch driving signals to the touch driving electrodes to perform a touch scan, and the integrated circuit receives sensing signal change quantities of the touch sensing electrodes surrounding a same one of the touch driving electrodes, to determine a touch position.