Radiation-Emitting Device Electrode Removal for Intensity Control
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Solution Overview
Problem
Existing radiation-emitting devices struggle to achieve continuous transitions in radiation intensity without requiring complex voltage control and structural variations across different parts of the device.
Innovation Solution
A radiation-emitting device with a substrate and a layer sequence comprising a first electrode area, a second electrode area, and a functional layer, where the first electrode area is partly removed in specific regions to create conductive interruptions, allowing for controlled current flow and varying radiation intensity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If different regions of the device are driven with different voltages to achieve varying radiation intensities, then location-dependent radiation intensity is achieved, but complex control and complex structure are required
Solution Approach 1:
The patent applies local quality by creating removal regions with varying degrees of electrode material removal at different locations. This causes different sheet resistances in different regions, which in turn produces different voltage drops and current densities under uniform voltage drive, achieving location-dependent radiation intensity without complex control circuits
Solution Approach 2:
The patent changes the electrical parameter (sheet resistance) of the electrode area by selectively removing portions of the electrode material in different regions. This parameter change creates intentional voltage drops that control the current distribution and radiation intensity profile across the device area
2Illumination intensity
If only specific regions are designed to emit radiation, then radiation intensity variation is achieved, but continuous transitions are not possible and areal construction variation is required
Solution Approach 1:
The patent creates a continuous gradient of local qualities by varying the extent of electrode material removal across different regions. This produces a smooth transition in sheet resistance values, which generates continuous transitions in voltage drop and current density, enabling grayscale rendering without discrete on/off regions
Solution Approach 2:
The patent introduces a new dimension of control by varying the thickness/coverage of the electrode area in the vertical dimension (through selective removal), rather than relying on areal segmentation. This dimensional approach enables continuous intensity transitions while maintaining a uniform areal construction
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
Enables continuous transitions in radiation intensity across the device without complex voltage control, allowing for precise intensity profiles and representation of information through varying gray levels.
Implementation Method 1
at least one functional layer between the first electrode area and the second electrode area, wherein the functional layer generates electromagnetic radiation in a switched-on operating state
Data Source
AI summary
A radiation-emitting device includes a substrate; and at least one layer sequence arranged on the substrate that generates electromagnetic radiation, including at least one first electrode area, at least one second electrode area, and at least one functional layer between the first electrode area and the second electrode area, wherein the functional layer generates electromagnetic radiation in a switched-on operating state, and at least one removal region is arranged between at least two points of the first electrode area conductively connected to one another by the first electrode area, the first electrode area being at least partly removed in the at least one removal region.