Static Electricity Discharge Element for Crack Sensing Circuit
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Solution Overview
Problem
Display panels, such as LCDs and OLEDs, are prone to cracks during manufacturing, which can lead to signal line disconnections, increased resistance, and moisture penetration, reducing the reliability and causing malfunctions.
Innovation Solution
Incorporating a crack sensing circuit with a static electricity discharge element in the display panel's circuit area, which includes a crack sensing line with ends connected to input pads and data lines, and capacitors for static electricity discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a crack sensing circuit is added to detect cracks in the display panel, then defect detection capability is improved, but the circuit becomes more vulnerable to static electricity damage
Solution Approach 1:
A static electricity discharge element is introduced as an intermediary component between the crack sensing circuit and the external environment. This element acts as a mediator that safely channels static electricity away from the sensitive circuitry, allowing the crack sensing function to operate reliably without direct exposure to static charge accumulation.
Solution Approach 2:
The static electricity discharge element converts the potentially harmful static electricity into a beneficial controlled discharge path. By providing a designated route for static charge to dissipate, the system transforms what would be a destructive force into a manageable electrical flow that protects rather than endangers the crack sensing circuit.
2Reliability
If the display panel structure is made more complex to include crack sensing lines and circuits, then crack detection capability is improved, but the panel becomes more prone to static electricity accumulation
Solution Approach 1:
The static electricity discharge element is designed to serve multiple functions within the crack sensing system. It simultaneously protects the crack sensing circuit from static damage, maintains electrical connectivity throughout the sensing lines, and provides a reference potential for accurate crack detection, thereby reducing the need for additional separate protective components.
Solution Approach 2:
The static electricity discharge functionality is merged with the existing crack sensing circuit architecture rather than being implemented as a completely separate system. The discharge element is integrated into the circuit layout, combining protective function with the crack sensing function to minimize overall structural complexity.
3Object-affected harmful factors
If static electricity discharge elements are added to protect the circuit, then protection from static electricity is improved, but the circuit area occupies more space
Solution Approach 1:
The static electricity discharge element is strategically positioned at specific locations within the circuit area where static charge accumulation is most likely to occur, rather than uniformly distributed throughout the entire circuit. This localized placement provides effective protection while minimizing the total area occupied by discharge elements.
Solution Approach 2:
Instead of providing static discharge protection at every possible location in the circuit, the design implements discharge elements at the most critical points where static accumulation would be most harmful. This partial coverage approach provides sufficient protection with minimal area expenditure, avoiding the excessive action of full-coverage discharge elements.
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 effectively protects defect-detecting circuits from static electricity and optimizes defect detection accuracy, preventing erroneous defect detection and ensuring reliable operation of the display panel.
Implementation Method 1
the static electricity discharge element may comprise a capacitor comprising a third end connected to the first test data line, and a fourth end connected to the second test data line as two terminals
Implementation Method 2
a crack sensing circuit comprising a static electricity discharge element connected to the second end
Data Source
AI summary
A display device is provided. The display device may include a substrate, a plurality of pixels, a first data line, a second data line, a defect sensing line, a first input pad, and a static electricity discharge element. The substrate may include a display area and a peripheral area neighboring each other. The plurality of pixels may be positioned on the display area and may include a first pixel and a second pixel. The first data line may be electrically connected to the first pixel. The second data line may be electrically connected to the second pixel and may be electrically isolated from the first data line. The defect sensing line may be positioned on the peripheral area. The first input pad may be electrically connected to the defect sensing line. The static electricity discharge element may be electrically connected through the defect sensing line to the first input pad.