Short Detection Line in Light Emitting Display Panel
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Solution Overview
Problem
Light emitting display devices face challenges in detecting shorts within their panels, which can lead to excessive current flow, overheating, and potential fires, as existing technologies lack effective methods for real-time detection and prevention of such defects.
Innovation Solution
A light emitting display device with a structure for short detection, comprising a first power line, a second power line, and a line for short detection between them, along with a short detecting unit that applies a voltage and senses values to determine if a short occurs, allowing for timely intervention to prevent damage and fires.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If no short detection structure is provided in the display panel, then the device complexity is reduced, but the reliability deteriorates due to inability to detect shorts
Solution Approach 1:
The short detection line is merged with the existing power line structure in the display panel. The detection line shares the same physical space and routing as the power lines, combining the power supply function and short detection function into a single integrated structure, thereby improving reliability without significantly increasing device complexity
Solution Approach 2:
The detection line structure serves multiple functions: it acts as both a power supply conduit and a short detection sensor. By making the power line structure multi-functional, the patent achieves short detection capability while avoiding the need for separate dedicated detection structures, thus resolving the contradiction between reliability improvement and complexity increase
2Reliability
If real-time short detection is implemented, then the reliability is improved, but the device complexity increases due to additional detection circuits
Solution Approach 1:
The detection line utilizes the existing power supply voltage to perform self-detection for shorts. When a short occurs, the voltage change on the detection line automatically indicates the fault condition without requiring external detection circuits or additional power consumption, thereby improving reliability while maintaining simple device structure
Solution Approach 2:
The patent replaces complex electronic detection circuits with a simple voltage-based detection mechanism. Instead of using sophisticated sensors or measurement circuits, the system uses the inherent electrical properties of the power line itself to detect shorts, substituting mechanical/electronic complexity with a simpler electrical measurement approach
3Measurement precision
If a voltage for short detection is continuously applied to the line for short detection, then the detection precision is improved, but the use of energy increases
Solution Approach 1:
The detection voltage is applied periodically or intermittently rather than continuously. The system performs short detection at specific intervals or under specific conditions (e.g., during power-on, after faults are suspected), reducing energy consumption while maintaining adequate detection precision through strategic timing of measurements
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
The solution enables real-time detection and prevention of shorts, limiting power supply operations to prevent damage and potential fires, thereby ensuring safety and reliability of the display device.
Implementation Method 1
applying a voltage for short detection to the line for short detection; sensing the line for short detection to detect a sensing value
Data Source
AI summary
A light emitting display device includes a display panel, a structure for short detection, and a short detecting unit. The display panel displays an image. The structure for short detection includes a first power line, a second power line, and a short detection line disposed between the first power line and the second power line in the display panel. The short detecting unit senses a sensing value from the short detection line and determines whether a short occurs in the display panel on the basis of the sensing value.