Display Device With Shared-Line Temperature Sensing for Color Drift
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Solution Overview
Problem
Mini LEDs and uLEDs experience color drift due to temperature changes caused by different driving currents, leading to inconsistent display quality over time.
Innovation Solution
Incorporating temperature sensing circuits and touch pads in a display device, connected via a common signal line, to sense temperature and generate signals in different time intervals, allowing the processor to adjust display data values accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If different driving currents are applied to different display areas, then display brightness and image quality are improved, but temperature changes cause color drift in the display areas
Solution Approach 1:
The patent applies preliminary action by measuring the temperature of each display area before it causes color drift to occur. Temperature sensing circuits continuously monitor the temperature, and the system proactively adjusts driving currents based on the measured temperature values, preventing color drift before it affects display quality.
Solution Approach 2:
The patent implements feedback by creating a closed-loop control system where temperature sensing circuits continuously monitor display area temperature, the control unit receives temperature signals, processes them to determine compensation values, and adjusts the driving currents accordingly. This feedback loop ensures that temperature-induced color drift is continuously corrected.
2Reliability
If temperature sensing circuits are added to each display area, then color drift is eliminated, but device complexity increases
Solution Approach 1:
The patent applies universality by designing temperature sensing circuits that can serve multiple purposes: they measure temperature for color drift compensation, and their signals are integrated into the existing display control architecture through shared signal lines and processing units. This multi-functional approach reduces the net increase in system complexity.
Solution Approach 2:
The patent merges the temperature sensing function with the existing display control system by integrating temperature sensing circuits into the pixel circuit structure and sharing signal lines with the display driver. The control unit processes both display data and temperature signals together, combining multiple functions into a unified system that minimizes additional 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
Eliminates color shift by adjusting display data based on temperature information, providing consistent image quality across the display area.
Implementation Method 1
The first temperature sensing circuit is configured to sense and generate a first temperature sensing signal corresponding to an operating temperature
Data Source
AI summary
A display device and a display method are provided. The display device includes a first touch pad and a first temperature sensing circuit. The first touch pad is configured to sense and generate a first touch signal. The first temperature sensing circuit is configured to sense and generate a first temperature sensing signal corresponding to an operating temperature. A multiplexer is coupled to the first touch pad and the first temperature sensing circuit through a common signal line. The multiplexer is configured to output the first touch signal and the first temperature sensing signal in different time intervals.