Array Substrate Detection Line for Common Electrode Voltage Stability
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Solution Overview
Problem
In display panels, the voltage variation at the common electrode of the array substrate cannot be detected due to parasitic capacitance, which affects the stability of the voltage at the common electrode of the array substrate.
Innovation Solution
An array substrate design that includes a base substrate with pixel electrodes, first common electrodes, a first-common-signal line, and a detection line, where the detection line and first-common-signal line are insulated and have at least one intersection point, allowing for the detection of voltage variations at the common electrode by connecting them outside the substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data lines are used to input voltage to pixel electrodes, then the display panel can operate, but parasitic capacitance occurs between the data line and the common electrode of the array substrate, causing voltage variation at the common electrode that cannot be detected
Solution Approach 1:
The patent introduces a detection line as an intermediary element that is insulated from but spatially intersects with the first-common-signal line. This detection line acts as a mediator to sense voltage variations at the common electrode without directly electrically connecting to it, thereby enabling detection while maintaining electrical insulation and avoiding additional parasitic capacitance pathways.
2Measurement precision
If the detection line and first-common-signal line are connected directly, then voltage variation can be detected, but parasitic capacitance increases affecting voltage stability
Solution Approach 1:
The detection line serves as an intermediary sensing element that detects voltage variations through spatial intersection and electromagnetic coupling rather than direct electrical connection. This intermediary approach enables measurement while avoiding the creation of additional parasitic capacitance that would result from direct connection.
Solution Approach 2:
The patent replaces direct electrical connection (mechanical/electrical contact) with electromagnetic field-based detection. The detection line senses voltage variations through electromagnetic coupling and spatial intersection without physical electrical contact, substituting a field-based sensing mechanism for a contact-based measurement system.
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 the detection and potential compensation of voltage variations at the common electrode of the array substrate, improving the stability of the display panel's operation by addressing parasitic capacitance issues.
Implementation Method 1
a parasitic capacitance will occur between the data line and the common electrode of the array substrate
Data Source
AI summary
An array substrate and a display device. The array substrate includes a base substrate, a plurality of pixel electrodes, a plurality of first common electrodes, a first-common-signal line and a connection line, that are disposed on the base substrate. The first common electrode is a common electrode of the array substrate. The connection line is connected between the first-common-signal line and the first common electrode, enabling a voltage from the first-common-signal line to be output to the first common electrode through the connection line. The array substrate also includes a detection line, the detection line and the first-common-signal line are insulated from each other, and an orthographic projection of the detection line on the base substrate and an orthographic projection of the first-common-signal line on the base substrate have at least one intersection point. The detection line is also arranged to be extended outside the base substrate.