Touch Display Panel Temperature Mapping Using Touch Sensors
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Solution Overview
Problem
Existing display panels cannot detect temperature at different regions, only providing a single temperature value for the entire panel area.
Innovation Solution
A temperature detecting method for touch display panels that utilizes a controller to obtain raw data from touch sensors during a temperature sensing period, calculate multiple temperature values at various regions using lookup information, and output a temperature detecting result without the need for a separate temperature detector.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a temperature detector is arranged in a driving integrated circuit of the display panel, then the display panel can implement temperature detection function, but only one temperature value at the whole panel area can be obtained and temperature at different regions cannot be detected
Solution Approach 1:
The display panel is divided into multiple regions, and temperature detection is performed separately for each region. The controller obtains raw data from touch sensors in different regions during a temperature sensing period, then calculates temperature values for each region independently using lookup tables, thereby obtaining temperature distribution information across the panel.
Solution Approach 2:
The touch sensors are utilized for dual purposes: touch detection and temperature detection. During a temperature sensing period, the touch sensors function as temperature sensing elements, allowing the existing sensor array to provide temperature information without requiring separate temperature detector hardware.
2Loss of information
If a separate temperature detector is added to detect temperature at different regions, then temperature distribution can be detected, but device complexity and hardware cost increase
Solution Approach 1:
The touch sensors perform both touch detection and temperature detection functions. By utilizing the existing sensor array for dual purposes, the system avoids adding separate temperature detector hardware, thereby maintaining device simplicity while enabling temperature distribution detection.
Solution Approach 2:
The touch sensors themselves provide temperature sensing capability without requiring external temperature detection hardware. The system uses its own existing components (touch sensors and controller) to accomplish temperature detection, eliminating the need for additional dedicated temperature detection elements.
Data Source
AI summary
A temperature detecting method is disclosed. The temperature detecting method is adapted to a touch display panel and includes the following steps. The touch display panel includes a controller and multiple touch sensors. The controller obtains raw data according to touch sensing signals output from the touch sensors during a temperature sensing period. The controller calculates multiple temperature values at multiple regions of the touch display panel, according to the raw data and lookup information. The controller outputs a temperature detecting result including the temperature values.