Display Base Plate Edge Anti-Static Structure for OLED Screen Greening
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Solution Overview
Problem
The accumulation of electrostatic charges on OLED touch screens due to finger sliding causes polarization reactions, leading to deviations in thin-film transistor characteristics and screen greening, which deteriorates display performance.
Innovation Solution
A displaying base plate with an anti-static layer located in the edge region, surrounded by cutting-transition and crack-dam regions, and including a first protrusion and planarization parts, which blocks and releases electrostatic charges to reduce their conduction to the driving unit, thereby reducing transistor deviations and improving display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the OLED touch screen is used for continuous finger sliding, then the touch functionality is maintained, but electrostatic charges accumulate causing screen greening and display deterioration
Solution Approach 1:
An anti-static layer is introduced as an intermediary component between the touch screen surface and the driving back plate. This layer acts as a mediator to dissipate electrostatic charges generated during finger sliding, preventing charge accumulation and polarization reactions that cause screen greening, while maintaining touch functionality.
Solution Approach 2:
The harmful electrostatic charges are extracted and dissipated through the anti-static layer before they can penetrate into the driving back plate and cause damage to the thin-film transistors. The anti-static layer specifically targets and removes the harmful charge accumulation at the edge region.
2Object-affected harmful factors
If the anti-static layer is extended to cover the active area, then electrostatic protection is improved, but the touch sensitivity and display quality may be affected
Solution Approach 1:
The anti-static layer is strategically positioned only in the edge region and non-active area, leaving the active area uncovered. This local placement provides electrostatic protection where charges accumulate most (at the edges during finger sliding) while preserving the touch sensitivity and display quality in the active display region.
3Reliability
If the insulating layer with organic polymerized molecules is used, then electrical insulation is provided, but electrostatic charges accumulate and cause polarization reactions
Solution Approach 1:
The anti-static layer serves as an intermediary between the insulating layer and the external environment, providing a charge dissipation path that prevents electrostatic charges from accumulating in the insulating layer and causing polarization reactions, while the insulating layer maintains its electrical insulation function.
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 anti-static layer effectively reduces the conduction of electrostatic charges, minimizing transistor deviations and enhancing display performance by preventing screen greening.
Implementation Method 1
an anti-static layer provided on the substrate, wherein the anti-static layer is located at least within the edge region
Data Source
AI summary
A displaying base plate includes an active area and a non-active area connected thereto. The non-active area includes an edge region and a first-dam region located between the active area and the edge region. The displaying base plate includes: a substrate, and an anti-static layer provided on the substrate and located at least within the edge region. The edge region includes a cutting-transition region, a crack-dam region and a driving-circuit region. The crack-dam region surrounds the first-dam region, and is broken at the driving-circuit region. The cutting-transition region surrounds the crack-dam region and the driving-circuit region. The displaying base plate includes a first planarization part located within the cutting-transition region and the crack-dam region, and a first protrusion located within the crack-dam region. The first protrusion is provided on one side of the first planarization part away from the substrate, and the anti-static layer covers the first protrusion.