Charge Pump Ground Opening in Display Circuit Boards for ESD Protection
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Solution Overview
Problem
Display devices are prone to component damage due to static electricity generated around charge pumps, which existing technologies have not effectively addressed.
Innovation Solution
A display device design that includes a circuit board with a charge pump capacitor, where the first cover layer is removed around the capacitor to expose a ground line, allowing static electricity to be discharged to the ground.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a charge pump capacitor is used in the circuit board, then the display device can generate necessary voltages for operation, but static electricity is generated around the capacitor causing component damage
Solution Approach 1:
The patent extracts the harmful static electricity from around the charge pump capacitor by removing the first cover layer in a specific region. This creates a discharge path that separates the harmful static electricity from the functional charge pump capacitor, allowing the capacitor to continue generating voltage while the static electricity is safely conducted away through the ground line.
Solution Approach 2:
The patent converts the harmful static electricity into a beneficial discharge path. By removing the cover layer and exposing the ground line, the previously harmful static electricity is transformed into a controlled discharge mechanism that protects components while maintaining the charge pump's voltage generation function.
2Reliability
If the first cover layer is removed around the charge pump capacitor, then static electricity can be discharged to the ground line, but the circuit board structure becomes more complex
Solution Approach 1:
The patent applies local quality by removing the first cover layer only in a specific region around the charge pump capacitor, rather than modifying the entire circuit board. This localized modification creates the necessary discharge path while maintaining the integrity and simplicity of the overall circuit board structure in other areas.
Solution Approach 2:
The patent segments the circuit board structure by dividing it into regions with different cover layer configurations. The first cover layer is removed in the specific region around the charge pump capacitor while remaining intact in other areas, creating a segmented structure that provides both protection and discharge functionality.
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
This design effectively prevents component damage by discharging static electricity generated around the charge pump capacitor to the ground line, ensuring the reliability and longevity of the display device components.
Implementation Method 1
damage to components can be prevented by discharging static electricity generated around a charge pump capacitor to a ground line of a circuit board
Data Source
AI summary
A display device includes a display panel including a main area including a display area and a non-display area, and a sub-area extending from one side of the main area, and a circuit board connected to the sub-area and including a charge pump capacitor. Around the charge pump capacitor, a first cover layer of the circuit board is removed and an opening exposing a ground line disposed below the first cover layer is disposed.