Display Panel Black Matrix Annular Openings for ESD Protection
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Solution Overview
Problem
Electrostatic discharge (ESD) poses a significant challenge in the manufacturing and usage of electronic products, causing both sudden and potential damage, which can lead to instability and reduced service life, and is difficult to detect during the production process.
Innovation Solution
A display panel design featuring a black matrix layer with strategically placed annular and non-annular openings in the peripheral region, which disconnects the static electricity, preventing it from entering the display region and reducing electrostatic defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the black matrix layer is made continuous in the peripheral region, then the structural integrity and light shielding performance are improved, but static electricity can propagate through the continuous layer causing electrostatic damage
Solution Approach 1:
The black matrix layer in the peripheral region is divided into multiple disconnected segments by forming annular openings. These openings break the continuous conductive path of the black matrix layer, preventing static electricity propagation while maintaining the light shielding function of each individual segment
Solution Approach 2:
The annular openings act as intermediary barriers between different regions of the black matrix layer. By introducing these opening structures, the patent creates isolation zones that prevent direct electrical contact between adjacent black matrix segments, thereby blocking electrostatic discharge paths
2Object-affected harmful factors
If openings are introduced in the black matrix layer to block static electricity, then electrostatic damage is prevented, but light shielding performance and structural continuity are reduced
Solution Approach 1:
Rather than creating random openings, the patent uses annular (ring-shaped) openings that maintain radial symmetry and distribute the structural load evenly. This segmented approach preserves overall structural integrity while effectively blocking electrostatic paths
Solution Approach 2:
The black matrix layer is designed with different properties in different regions: in the display region, it maintains full continuity for optimal light shielding, while in the peripheral region, it is segmented by annular openings to prevent electrostatic damage. This localized differentiation optimizes both functions
3Object-affected harmful factors
If the black matrix layer is disconnected to prevent static electricity, then electrostatic damage is reduced, but the light shielding effectiveness and aesthetic appearance are compromised
Solution Approach 1:
The annular openings segment the black matrix layer into electrically isolated regions while maintaining visual continuity. The ring-shaped segments still provide effective light shielding in their respective zones, and their symmetric arrangement minimizes visual impact
Solution Approach 2:
The openings that initially seem to reduce light shielding capability actually serve a dual purpose: they block electrostatic discharge paths while the remaining black matrix segments continue to provide sufficient light shielding. The structural discontinuity becomes a functional advantage for electrostatic protection
Data Source
AI summary
A display panel and a display device are provided. The display panel has a display region and a peripheral region, a black matrix layer including a portion in the peripheral region; a first annular opening surrounding the display region and a second annular opening surrounding the first annular opening and on a side, away from the display region, of the first annular opening are provided in the portion of the black matrix layer; the first annular opening divides the portion of the black matrix layer into an inner part close to the display region and an outer part away from the display region; the second annular opening divides the outer part into a first part close to the display region and a second part away from the display region; both the first annular opening and the second annular opening are closed annular.