Force Touch Electrode Capacitance Sensing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional touch display devices require structural modifications to incorporate force touch functionality, leading to increased costs and reduced touch accuracy due to large assembly tolerances.
Innovation Solution
A touch display panel with a conductive structure and a display panel, where a force touch electrode on the base substrate forms a touch sensing capacitor with the conductive structure, allowing for force touch control without major modifications to the display device and minimizing the impact of assembly tolerance on touch precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If force touch functionality is incorporated into conventional touch display devices through structural modifications, then force touch control capability is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The display panel structure is designed to serve dual functions: displaying images and sensing force touch operations. The same display panel components (electrodes, substrates) are utilized for both display and force sensing purposes, eliminating the need for separate force sensing structures and reducing overall device complexity
Solution Approach 2:
The force sensing function is merged with the display panel structure by integrating force touch electrodes with the display electrode layers. The touch sensing capacitor is formed using the display panel's own conductive structures, combining two functions into a unified structure that reduces complexity
2Adaptability or versatility
If structural modifications are made to incorporate force touch functionality, then force touch control is enabled, but manufacturing cost increases
Solution Approach 1:
The display panel components are designed to perform multiple functions simultaneously. The same electrode layers and substrate used for display also serve as force sensing elements, eliminating the need for additional manufacturing steps and reducing production costs
Solution Approach 2:
The force sensing electrodes are integrated into the existing display electrode structure during the same manufacturing process. By combining force sensing and display functions in a single fabrication process, additional manufacturing steps are avoided, reducing overall manufacturing cost
3Ease of manufacture
If assembly tolerance is large in modified structures, then manufacturing ease is improved, but touch precision deteriorates
Solution Approach 1:
The force sensing function is segmented into discrete sensing areas corresponding to individual pixel units or sub-pixel units. Each sensing area is independently defined by the electrode structure, allowing precise localization of touch events even with assembly tolerances in the overall device assembly
Solution Approach 2:
The force sensing is achieved through capacitance changes in the vertical dimension (distance between electrodes) rather than relying on precise mechanical positioning in the horizontal plane. This dimensional shift allows the system to be less sensitive to assembly tolerances while maintaining high touch precision
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
Enables force touch control without altering the normal display device structure, enhancing user touch experience by improving touch accuracy and sensitivity.
Implementation Method 1
the force touch electrode and the conductive structure are correspondingly disposed and form a touch sensing capacitor to sense the touch operation
Data Source
AI summary
A touch display panel, a driving method thereof and a touch display device. The touch display panel includes a conductive structure and a display panel. The display panel is disposed on the conductive structure and includes a base substrate and at least one force touch electrode disposed on the base substrate. The conductive structure and the display panel are oppositely disposed and form a space. A distance between the force touch electrode and the conductive structure is changeable, and the force touch electrode and the conductive structure are correspondingly arranged and constitute a touch control sensing capacitor to sense a touch operation.