Integrated Sensing Panel for Pressure and Temperature Detection
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Solution Overview
Problem
Conventional touch sensing panels are unable to detect the strength of touch-pressure and the temperature of a touch object, which limits their functionality in applications requiring such information.
Innovation Solution
A sensing panel with integrated pressure and temperature detection units, utilizing thin film transistor switches and corresponding detecting devices, along with calculating circuits to process signals from scanning lines, data lines, and detection lines, allowing for the calculation of pressure strength and object temperature, as well as position detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional touch sensing panel is used, then position detection is achieved, but pressure strength and temperature detection are not available
Solution Approach 1:
The patent combines pressure detection units and temperature detection units within the same sensing panel structure. The pressure detecting device includes a first detecting electrode and a second detecting electrode, while the temperature detecting device includes a third detecting electrode and a fourth detecting electrode. These multiple detection functions are merged into a single integrated panel that shares common structural elements like the substrate and insulation layers, thereby achieving multi-parameter detection without proportionally increasing overall device complexity.
Solution Approach 2:
The sensing panel is designed with multi-functionality by incorporating both pressure detection and temperature detection capabilities within the same device structure. The detecting units are configured to perform different detection functions (pressure and temperature) using electrode combinations that can operate independently or together, making the panel universally applicable for various touch interaction scenarios requiring multiple sensing parameters.
2Measurement precision
If pressure and temperature detection units are integrated, then detection functionality is enhanced, but device complexity increases
Solution Approach 1:
The patent segments the detection functionality into distinct pressure detection units and temperature detection units, each with dedicated detecting electrodes and processing circuits. The pressure detecting device uses a first detecting electrode and a second detecting electrode, while the temperature detecting device uses a third detecting electrode and a fourth detecting electrode. This segmentation allows for specialized optimization of each detection function while maintaining clear separation of signal processing paths, which helps manage complexity through modular design.
Solution Approach 2:
The patent introduces a computing device as an intermediary that receives detection signals from both the pressure detecting device and the temperature detecting device. This intermediary component processes the signals, calculates pressure strength based on signal intensity differences, and determines temperature based on signal intensity ratios. By placing the complex processing logic in a separate computing device rather than embedding it directly in the sensing panel, the patent reduces the circuit complexity within the panel itself while maintaining high measurement precision.
Data Source
AI summary
A sensing panel and a manufacturing method of the same, and a method for pressure detection and temperature detection are disclosed in the present invention. The sensing panel comprises a scanning line, a first data line, a second data line, a first detection line, a second detection line, a pressure detecting unit, and a temperature detecting unit. The pressure detecting device is used to detect a pressure applied to the pressure detecting unit; the temperature detecting device is used to detect a temperature an object either near the temperature detecting unit or in contact with the temperature detecting unit. The present invention is able to detect the pressure and the temperature applied to the sensing panel.