Step-Like Functional Panel Structure for Crosstalk-Reduced Light Emission
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Solution Overview
Problem
Existing light-emitting devices suffer from crosstalk phenomena and inefficiencies in light emission due to current flow and light distribution issues, leading to suboptimal performance in functional panels, display devices, input/output devices, and data processing devices.
Innovation Solution
Incorporating a first electrode with light-transmitting properties and a step-like cross-sectional insulating film design that creates thin portions of light-emitting material regions, inhibiting current flow and concentrating light emission, while using pixel sets and conductive films for efficient image data supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a conventional light-emitting device structure is used, then light emission is achieved, but crosstalk phenomena occur and light emission efficiency is reduced
Solution Approach 1:
The device is divided into multiple independent light-emitting units (first light-emitting unit, second light-emitting unit) with partition walls between them. This segmentation prevents crosstalk by physically separating the current flow paths and light emission regions, while each unit maintains its own electrode structure (first lower electrode, second lower electrode) and light-emitting material layer, enabling independent operation and improved overall efficiency
Solution Approach 2:
The insulating layer is designed with varying thickness to create local quality differences: it is thicker in regions between adjacent light-emitting units to prevent crosstalk, and thinner in regions directly beneath the light-emitting units to allow efficient current injection and light emission. This localized variation in insulating layer thickness optimizes both crosstalk prevention and light emission efficiency in different spatial regions
2Object-generated harmful factors
If the insulating layer thickness is increased to prevent crosstalk, then crosstalk is reduced, but current flow efficiency and light emission are compromised
Solution Approach 1:
The insulating layer is segmented into different thickness regions: thicker portions in the inter-unit regions provide crosstalk isolation, while thinner portions in the intra-unit regions maintain efficient current flow. The partition walls further segment the structure to confine current and light to specific units, preventing lateral spread that would cause crosstalk while preserving vertical current injection efficiency
Solution Approach 2:
The insulating layer exhibits local quality variation with thickness optimized for different functions: thicker where isolation is needed (between units) and thinner where current injection is needed (beneath light-emitting units). This spatially differentiated design allows the same layer to simultaneously prevent crosstalk and maintain current flow efficiency
3Loss of energy
If light emission is concentrated in specific regions, then light emission efficiency is improved, but device complexity increases due to additional structural elements
Solution Approach 1:
The device is segmented into discrete light-emitting units with partition walls that confine light emission to specific regions. This segmentation naturally concentrates light emission in defined areas without requiring additional complex optical components, as the partition walls themselves serve as both structural dividers and light confinement elements
Solution Approach 2:
The partition walls serve multiple functions simultaneously: they provide mechanical separation between units, act as electrical insulation to prevent crosstalk, and serve as optical barriers to concentrate light emission. This multi-functionality achieves light concentration without adding separate dedicated components, thereby limiting the increase in device complexity
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 solution enhances the convenience, usefulness, and reliability of functional panels, display devices, input/output devices, and data processing devices by reducing crosstalk and optimizing light emission, enabling efficient image display and data processing.
Implementation Method 1
The first electrode has a light-transmitting property
Implementation Method 2
a layer containing a light-emitting material, and the layer containing a light-emitting material includes a region interposed between the first electrode and the second electrode
Implementation Method 3
The insulating film has a first step-like cross-sectional shape, and the first step-like cross-sectional shape surrounds the first opening portion when seen from above
Data Source
AI summary
A novel functional panel that is highly convenient, useful, or reliable is provided. The functional panel includes a first element, a first reflective film, and an insulating film. The first element includes a first electrode, a second electrode, and a layer containing a light-emitting material; the layer containing a light-emitting material includes a region interposed between the first electrode and the second electrode; the first electrode has a light-transmitting property; and the first electrode has a first thickness. The first electrode is interposed between a region of the first reflective film and the layer containing a light-emitting material, and the first reflective film has a second thickness. The insulating film includes a first opening portion, and the first opening portion overlaps with the first electrode. The insulating film has a first step-like cross-sectional shape, and the first step-like cross-sectional shape surrounds the first opening portion. The first step-like cross-sectional shape includes a first step, and the first step is larger than or equal to a thickness obtained by adding the second thickness to the first thickness.