Hybrid Touch Substrate with Pressure Detecting Element
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Solution Overview
Problem
Conventional touch display technologies, such as capacitive and resistive types, either limit touch means or require significant pressure, making them unsuitable for smooth and versatile touch interactions.
Innovation Solution
A hybrid touch detection method that utilizes both electrical charge and pressure sensing, employing a touch substrate with a pressure detecting element like quantum tunneling composite (QTC) between electrode parts, allowing for detection of touch position regardless of the touch means used, and a controller to manage tactile feedback intensity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If capacitive type touch display is used, then power consumption is reduced and touch action is smooth, but touch means is limited because touch means must generate change in electrical charge
Solution Approach 1:
The patent combines capacitive touch detection and pressure detection into a single hybrid touch display system. The capacitive sensor detects electrical charge changes from various touch means, while the pressure sensor detects applied pressure, allowing the system to accommodate multiple touch input methods (finger, stylus, etc.) without requiring additional power consumption compared to pure capacitive systems.
Solution Approach 2:
The hybrid touch display system serves multiple functions by detecting both capacitive changes and pressure applications. This universal approach allows any touch means (finger, stylus, or other objects) to interact with the display, expanding touch means versatility while maintaining efficient power consumption characteristics through intelligent signal processing that selects the appropriate detection mode.
2Adaptability or versatility
If resistive type touch display is used, then touch means is not limited, but smooth touch action is hard because relatively larger pressure must be applied
Solution Approach 1:
The system merges capacitive sensing with pressure sensing to create a hybrid detection mechanism. The capacitive component detects touch presence with minimal pressure, ensuring smooth touch action, while the pressure component provides additional verification and intensity detection. This combination maintains touch means versatility while dramatically improving ease of operation compared to pure resistive systems.
Solution Approach 2:
The patent replaces the purely mechanical pressure-based resistive detection system with a hybrid system that uses capacitive electrical field detection. This substitution allows touch detection through electrical charge changes rather than requiring significant mechanical pressure, thereby achieving smooth touch action while maintaining versatility in accepting various touch means.
3Adaptability or versatility
If hybrid type touch detection is used, then touch position can be detected regardless of touch means, but device complexity increases due to multiple detection mechanisms
Solution Approach 1:
The hybrid touch detection system is segmented into distinct capacitive sensing regions and pressure sensing regions within the touch display structure. Each region operates independently with its own detection mechanism, allowing the system to handle different touch means appropriately. This segmentation simplifies the overall control logic by dividing the detection function into manageable modules that can be processed separately and then integrated.
Solution Approach 2:
The system dynamically changes detection parameters based on the type of touch input detected. When capacitive changes are detected, the system adjusts its pressure threshold and detection algorithm to match the expected characteristics of that touch means. This adaptive parameter adjustment allows the complex hybrid system to operate with the simplicity of a single-detection system, as the control logic automatically adapts to the input method.
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 smooth and versatile touch interactions by detecting touch positions based on electrical charge or pressure, providing accurate and responsive tactile feedback regardless of the touch input, thus improving user experience.
Implementation Method 1
A pressure detecting element having a resistance changed according to a pressure between a first electrode part and a second electrode part
Implementation Method 2
employing a touch substrate with a pressure detecting element like quantum tunneling composite (QTC)
Data Source
AI summary
Method of detecting a touched position on a touch display of a display apparatus includes determining an amount of an electrical charge generated by a touch on the touch display panel of a display apparatus, determining a difference between the amount of the electrical charge generated from the touch and an amount of a reference electrical charge and comparing this difference to a threshold value, detecting the position of the touch if it is determined that the difference between the amount of the electrical charge generated from the touch and the amount of the reference electrical charge is substantially the same as or larger than the threshold value and detecting the touched position using a pressure according to the touch if it is determined that difference between the amount of the electrical charge and the amount of the reference voltage is smaller than the threshold value.