Touch Display Deformation Region Pressure Sensing
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Solution Overview
Problem
Existing touch input methods on mobile terminals are limited and inconvenient, failing to effectively sense touch coordinates and pressure, which hampers user interaction and control of functions.
Innovation Solution
A mobile terminal with a touch display unit that incorporates a touch sensing unit capable of sensing touch coordinates and pressure, utilizing a configuration of interlayered sensing electrodes and a deformation region to detect changes in capacitance, allowing for precise control commands based on touch inputs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional touch screen display unit is used, then the device structure remains simple, but it cannot sense touch pressure and only provides limited touch input functionality
Solution Approach 1:
The patent combines multiple sensing functions (touch coordinate detection and touch pressure sensing) into a single integrated display unit by layering multiple sensing electrodes (first, second, and third sensing electrodes) within the display structure. This merging approach enables the display unit to perform both basic touch detection and pressure sensing without requiring separate external sensors, thereby improving versatility while managing structural complexity through integration.
Solution Approach 2:
The display unit is designed to serve multiple functions simultaneously: it acts as both the display interface and the touch sensing interface, while also functioning as a pressure sensor. The multiple sensing electrodes enable the same display unit to detect touch location, touch pressure, and generate control signals, making it a universal interface that eliminates the need for separate components.
2Measurement precision
If only touch coordinates are sensed, then the sensing mechanism remains simple, but user control precision and interaction quality are limited
Solution Approach 1:
The sensing mechanism is segmented into multiple independent sensing electrodes (first sensing electrode, second sensing electrode, third sensing electrode), each responsible for detecting different aspects of touch input. The first and second sensing electrodes detect touch coordinates, while the third sensing electrode detects touch pressure. This segmentation allows the system to measure multiple parameters simultaneously with high precision while keeping each individual sensing element relatively simple.
Solution Approach 2:
The patent transitions from two-dimensional touch coordinate detection to three-dimensional sensing by adding pressure detection as a third dimension. The multiple sensing electrodes arranged in layers enable detection not only of X-Y coordinates but also of the Z-axis pressure information, thereby enhancing control precision by capturing the full spatial and force characteristics of user input.
3Measurement precision
If multiple sensing electrodes are layered to detect touch pressure, then touch pressure sensing capability is improved, but the display unit structure becomes more complex
Solution Approach 1:
The patent implements a nested structure where multiple sensing electrodes are layered within each other inside the display unit. The first sensing electrode is positioned on one side of the display panel, the second sensing electrode is positioned on the opposite side, and the third sensing electrode is integrated within the display structure. This nesting approach allows multiple sensing functions to be packed into a compact space, improving pressure sensing capability while minimizing the increase in overall structural complexity.
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 more intuitive and accurate control of mobile terminal functions by simultaneously sensing touch coordinates and pressure, enhancing user interaction and functionality.
Implementation Method 1
utilizing a configuration of interlayered sensing electrodes and a deformation region to detect changes in capacitance
Data Source
Figure 1A
Figure 1B~1C
Figure 1D
AI summary
A mobile terminal including a wireless communication unit configured to provide wireless communication; a body configured to form an external appearance of the terminal; and a touch display unit formed on the body. Further, the touch display unit includes a display panel configured to display screen information, a window formed on the display panel, a first sensing unit and a second sensing unit disposed below the window and configured to sense touch coordinates of a touch input on the window, a deformation region configured to deform with at least one region of the window where the touch input occurs on the window, and a third sensing unit separated from the first sensing unit by interposing the deformation region therebetween. The terminal also includes a controller configured to execute a specific control command based on the touch input sensed by the first through the third sensing units.