Array Substrate Electrostatic Shielding for GOA Yield
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Solution Overview
Problem
The existing Gate Driver on Array (GOA) technology results in low product yield due to high capacitance values and electric field non-uniformity between the peripheral wiring and display regions, caused by the large wiring density of the GOA circuit.
Innovation Solution
An electrostatic shielding layer is formed on the side of the peripheral circuit, comprising a first conductive layer, an insulating layer, and a second conductive layer with a connecting portion, to reduce the outward-radiated electric field and uniformize capacitance detections between the display and peripheral wiring regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If GOA technology is used to integrate gate drive circuit on array substrate, then display panel functionality is improved, but product yield deteriorates due to high capacitance values and electric field non-uniformity
Solution Approach 1:
An electrostatic shielding layer is introduced as an intermediary component between the peripheral GOA circuit and the display region. This shielding layer, comprising conductive layers and insulating layers, mediates the electric field interaction by blocking and redirecting electric field lines, thereby preventing the harmful electric field radiation from the high-capacitance GOA circuit from affecting the display region, thus improving product yield while maintaining display functionality
Solution Approach 2:
The harmful electric field radiation is extracted and isolated from the display region by the electrostatic shielding layer. The shielding structure separates the high-capacitance GOA circuit's electric field from the sensitive display area, effectively removing the negative impact on display uniformity and capacitance detection accuracy
2Device complexity
If high wiring density is used in peripheral GOA circuit, then circuit integration is improved, but electric field uniformity deteriorates causing capacitance detection issues
Solution Approach 1:
The electrostatic shielding layer acts as a mediator that allows the high-density GOA circuit to maintain its integrated design while preventing its electric field from interfering with capacitance detection in the display region. The shielding structure with its conductive and insulating layers creates an electric field barrier that preserves detection uniformity despite high circuit density
Solution Approach 2:
The electrostatic shielding layer creates equipotential regions that stabilize the electric field distribution. By forming a shielded environment, the structure ensures that capacitance detection in the display region remains uniform and不受干扰 from the non-uniform electric field generated by the dense peripheral GOA circuit
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 electrostatic shielding layer improves the product yield of the array substrate by reducing electric field radiation and uniformizing capacitance values, enhancing the manufacturing efficiency and quality of the display panel.
Implementation Method 1
an electrostatic shielding layer disposed over the peripheral circuit and the base substrate
Implementation Method 2
a first conductive layer on a side of the peripheral circuit away from the base substrate; an insulating layer on the first conductive layer; and a second conductive layer on the insulating layer
Data Source
AI summary
An array substrate, a display device and a method for manufacturing the array substrate are provided. The array substrate includes a display region and a peripheral wiring region, wherein the array substrate includes: a base substrate; a peripheral circuit in the peripheral wiring region and on the base substrate; and an electrostatic shielding layer disposed over the peripheral circuit and the base substrate.