Split-Anode Display Device for Localized Dark Spot Isolation
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Solution Overview
Problem
In display devices, particles during manufacturing can cause shorts between electrodes, leading to dark spots and reduced luminance, and existing technologies do not effectively minimize the size of these dark spots.
Innovation Solution
The display device incorporates a driving transistor with an anode electrode split into two parts, connected by connection lines of different resistances, allowing for precise detection and isolation of short-circuited light emitting elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If particles occur on the first electrode during manufacturing, then a short occurs between the first electrode and the second electrode, but all subpixels in which particles occur become dark spots so as not to emit light, deteriorating luminance
Solution Approach 1:
The anode electrode is divided into a first anode electrode and a second anode electrode that are spaced apart from each other. This segmentation ensures that if a particle causes a short circuit in one region, only the corresponding light emitting element becomes defective rather than all subpixels, thereby minimizing dark spot size and maintaining overall luminance.
Solution Approach 2:
The patent applies different resistance values to different connection lines: the first anode connection line has greater resistance than the second anode connection line. This local differentiation in electrical properties allows for optimized current distribution and helps isolate defects to specific regions, preventing widespread luminance deterioration.
2Manufacturing precision
If particles occur on the first electrode, then manufacturing defects occur, but existing technologies do not effectively minimize the size of dark spots
Solution Approach 1:
By segmenting the anode electrode into spatially separated first and second anode electrodes, the patent enables precise localization of particle-induced shorts. When a short occurs, only the affected light emitting element fails rather than the entire subpixel, effectively minimizing the dark spot area resulting from manufacturing defects.
3Productivity
If particles cause shorts between electrodes, then manufacturing waste increases due to greenhouse gas emissions, but current methods do not reduce environmental impact
Solution Approach 1:
The patent converts the harmful effect of particles into a localized rather than catastrophic failure mode. By designing spaced-apart anode electrodes, particle-induced shorts affect only individual light emitting elements rather than causing complete subpixel failure, thereby reducing manufacturing waste and associated environmental harm.
Data Source
AI summary
A display device and manufacturing method thereof is provided. the display device comprises a driving transistor provided on a substrate, a light emitting element provided on the driving transistor, including an anode electrode, a light emitting layer, and a cathode electrode, the anode electrode including a first anode electrode and a second anode electrode, which are disposed to be spaced apart from each other, a first anode connection line electrically connecting the first anode electrode to the driving transistor, and a second anode connection line electrically connecting the second anode electrode to the driving transistor. The first anode connection line has resistance greater than that of the second anode connection line.