Integrated Pressure Sensing Electrodes in Display Panels
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current pressure sensing technologies in display panels, such as those in mobile phones and tablets, require structural changes and suffer from low detection accuracy due to large assembly tolerances.
Innovation Solution
A display panel design with voltage-fixed electrodes and pressure sensing electrodes integrated inside the panel, allowing for accurate pressure detection without altering the entire structure, using capacitance changes to determine pressure applied at touch positions, while preventing finger interference with fixed voltage application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pressure sensing is realized by adding an extra component at a backlight part or frame, then pressure detection function is achieved, but the detection accuracy deteriorates due to large assembly tolerance and structural complexity increases
Solution Approach 1:
The patent merges the pressure sensing function with the existing display panel structure by integrating pressure sensing electrodes into the array substrate and voltage-fixed electrodes into the color filter substrate. This combination eliminates the need for separate pressure sensing components, thereby maintaining detection accuracy while avoiding increased device complexity
Solution Approach 2:
The display panel is designed to perform multiple functions: display function through pixel electrodes and common electrode, and pressure sensing function through pressure sensing electrodes and voltage-fixed electrodes. This multi-functionality allows the same structure to serve both display and pressure detection purposes without requiring additional dedicated components
2Measurement precision
If voltage-fixed electrodes are applied to prevent finger interference, then detection accuracy is improved, but energy consumption increases due to continuous voltage application
Solution Approach 1:
The patent implements periodic action by applying fixed voltage to the voltage-fixed electrodes only during specific stages (display stage and pressure detection stage) rather than continuously. The touch recognition stage uses a different voltage configuration, creating a periodic voltage application pattern that reduces overall energy consumption while maintaining detection accuracy when needed
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 high-accuracy pressure detection within the existing display panel structure, preventing finger influence on capacitance measurements and maintaining display functionality.
Implementation Method 1
the pressure sensing electrodes are configured to detect a pressure applied at a touch position on the display panel according to capacitances between the pressure sensing electrodes and the corresponding voltage-fixed electrodes
Data Source
AI summary
The present disclosure discloses a display panel, a method for driving the same and a display device. The display panel includes a display panel including a first substrate and a second substrate arranged opposite to each other. The first substrate includes: a first base, and voltage-fixed electrodes that are arranged on the first base at a side facing the second substrate. A fixed voltage is applied to each of the voltage-fixed electrodes. The second substrate includes: a second base, and pressure sensing electrodes that are arranged on the second base at a side facing the first substrate. The pressure sensing electrodes are arranged opposite to the voltage-fixed electrodes respectively, and configured to detect a pressure applied at a touch position on the display panel according to capacitances between the pressure sensing electrodes and the corresponding voltage-fixed electrodes at a pressure detection stage.