Light-Emitting Device Electrode Coupler for Pixel Isolation
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Solution Overview
Problem
There is a demand to further reduce light leakage between pixels in light-emitting devices, such as display devices that utilize light emitting diodes, as existing technologies are insufficient in minimizing crosstalk.
Innovation Solution
A light-emitting device and display device design where each pixel has a separate light-emitting element, a pixel electrode on one surface, a common electrode on the opposite surface, and an electrode coupler that electrically couples common electrodes in a distinct plane region, effectively separating and isolating the electrodes to reduce light leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the common electrode is provided continuously across adjacent pixels, then electrical connection is simplified, but light leakage between pixels increases
Solution Approach 1:
The common electrode is divided into multiple separate regions, each corresponding to a specific pixel, rather than being continuous across multiple pixels. This segmentation prevents light generated in one pixel from leaking into adjacent pixels through the common electrode, while still allowing electrical connection through the electrode coupler structure.
Solution Approach 2:
The electrode coupler acts as an intermediary component that electrically connects the separated common electrode regions without causing light leakage. It provides a controlled electrical pathway while maintaining optical isolation between pixels.
2Volume of moving object
If the pixel electrode and common electrode are closely positioned, then device structure is compact, but light leakage between pixels increases
Solution Approach 1:
Both the pixel electrode and common electrode are segmented into discrete regions corresponding to individual pixels. This allows close positioning for compactness while preventing light leakage through the segmentation that isolates each pixel's electrode structures.
Solution Approach 2:
The electrode structures have different configurations in different regions: within a pixel, electrodes are closely positioned for compactness, while between pixels, they are separated to prevent light leakage. This local variation in electrode arrangement resolves the contradiction.
3Ease of manufacture
If light-emitting elements are integrated across multiple pixels, then manufacturing is simplified, but light leakage between pixels occurs
Solution Approach 1:
The light-emitting elements are provided separately for each pixel rather than being integrated across multiple pixels. This segmentation prevents light generated in one pixel from leaking into adjacent pixels, while the overall device structure remains manufacturable through standardized pixel unit production.
Data Source
AI summary
A light-emitting device includes: a light-emitting element provided separately for each of pixels; a pixel electrode provided on a side of a first surface of the light-emitting element, the pixel electrode being provided for each of the pixels; a common electrode provided on a side of a second surface of the light-emitting element, the second surface being opposite to the first surface, the common electrode being provided separately for each of the pixels that are adjacent to each other; and an electrode coupler that electrically couples a plurality of the common electrodes provided for the respective pixels to each other in a plane region that is different from a plane region in which the light-emitting element is provided.