Ring Oscillator Temperature Detection Circuit for Display Panels
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Solution Overview
Problem
Conventional display panels face challenges in accurately detecting temperature across different areas, as existing temperature detectors are limited to opposite corners, failing to reflect the temperature state of the entire panel, which affects display quality and functionality.
Innovation Solution
A temperature detection circuit comprising an odd number of inverters coupled in series to form a loop, with switches controlling the inverters to determine temperature based on frequency, allowing for precise temperature detection across any area of the display panel, integrated either in a non-display or display area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If temperature detectors are placed only at opposite corners, then the device complexity is reduced, but the measurement precision of temperature across the entire panel deteriorates
Solution Approach 1:
The display panel is divided into multiple detection regions, with temperature detectors distributed across different areas including corners and edge centers. This segmentation allows comprehensive temperature monitoring of the entire panel without requiring a single complex detection system, resolving the contradiction between simple device structure and accurate temperature measurement across all regions.
2Measurement precision
If more temperature detectors are distributed across the panel, then the measurement precision improves, but the device complexity increases
Solution Approach 1:
The temperature detection circuit uses a universal ring oscillator design that can be replicated across multiple detection regions. Each detector follows the same inverter-loop structure with switches, allowing the system to achieve comprehensive temperature monitoring through standardized modular units rather than complex heterogeneous circuits, thus improving measurement precision without proportionally increasing device complexity.
3Reliability
If temperature detection is implemented across all areas, then the reliability of display quality control improves, but the manufacturing precision requirements increase
Solution Approach 1:
Temperature detectors are strategically positioned at specific locations such as corner regions and edge center regions where temperature variations are most significant for display quality. This local quality approach focuses manufacturing precision on critical areas rather than requiring uniform high precision across the entire panel, improving reliability of display quality control while managing manufacturing precision requirements.
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 comprehensive temperature detection across the display panel, improving display quality by allowing for temperature-based control of display areas, reducing errors, and simplifying the circuit structure.
Implementation Method 1
a temperature at a detection position is determined according to a frequency of a ring oscillator formed by the loop and a number of the inverters in the ring oscillator
Data Source
AI summary
The present disclosure relates to a temperature detection circuit, a display panel, and a display device. The temperature detection circuit includes: an odd number of inverters coupled end to end in series to form a loop; and a plurality of switches, two terminals of each of which correspondingly coupled to two terminals of an even number of inverters, which are coupled continuously, among the odd number of inverters.