Display Electrode Openings for Sub-Area Luminance Balancing
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Solution Overview
Problem
Display devices face challenges in maintaining uniform luminance due to variations in the number of light emitting elements across sub-areas, leading to luminance deviations.
Innovation Solution
A display device design that includes an organic layer with strategically arranged electrodes and insulating layers, featuring openings that expose the organic layer to allow for precise placement and adjustment of light emitting elements, ensuring uniform distribution and minimizing luminance deviations by allowing additional light emitting elements to be supplied to insufficient areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If light emitting elements are arranged in sub-areas defined by banks, then the display area is organized into manageable regions, but luminance deviation occurs due to non-uniform distribution of light emitting elements across sub-areas
Solution Approach 1:
The emission area is divided into multiple sub-areas by banks, allowing independent control and optimization of light emitting element distribution in each sub-area. This segmentation enables targeted adjustment of element density to achieve uniform luminance across the entire display area.
Solution Approach 2:
Different sub-areas can have different numbers of light emitting elements based on local requirements. The patent allows adding or removing light emitting elements in specific sub-areas to compensate for luminance deviations, creating non-uniform local distribution that results in uniform global luminance.
2Manufacturing precision
If openings are formed in electrodes and insulating layers to expose the organic layer, then light emitting elements can be precisely placed and adjusted, but the structural complexity of the device increases
Solution Approach 1:
Openings are pre-formed in the electrodes and insulating layers at specific positions before light emitting element placement. This preliminary preparation enables precise positioning of light emitting elements and facilitates the addition or removal of elements in specific sub-areas to achieve uniform luminance distribution.
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
This design achieves uniform luminance across sub-areas by allowing for the adjustment of light emitting elements, reducing luminance deviations and enhancing the overall display quality.
Implementation Method 1
A surface of the organic layer exposed by the opening may be liquid repellant
Data Source
Figure 1~2
Figure 3
Figure 4A
AI summary
A display device includes an organic layer, a first electrode and a second electrode disposed on the organic layer and spaced apart from each other, a first insulating layer disposed on the first electrode and the second electrode, and first light emitting elements disposed on the first insulating layer and disposed between the first electrode and the second electrode. An opening is formed by passing through the first insulating layer and at least one of the first electrode and the second electrode and exposes the organic layer.