Asymmetric Electrode Width for Light Emitting Element Concentration
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Solution Overview
Problem
Existing display devices face challenges in efficiently arranging light emitting elements during the manufacturing process, leading to losses and uneven distribution, which affects the display's performance and efficiency.
Innovation Solution
The display device incorporates electrodes with asymmetric structures and varying widths to concentrate light emitting elements in specific locations, utilizing an electric field to guide their arrangement during the manufacturing process, ensuring optimal placement and reducing waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If light emitting elements are arranged uniformly across the electrode area, then the manufacturing process is simple, but many light emitting elements are lost in undesired areas and the desired area cannot be fully utilized
Solution Approach 1:
The electrode is designed with an asymmetric structure where the width varies along its length. The first portion has a greater width than the second portion, creating an asymmetric width variation. This asymmetric geometry guides the light emitting elements to concentrate in the desired first portion area during the manufacturing process, reducing loss in undesired areas while maintaining a relatively simple arrangement process.
Solution Approach 2:
Different portions of the electrode are given different local qualities through varying widths. The first portion has a greater width to concentrate more light emitting elements, while the second portion has a smaller width. This local differentiation optimizes the utilization of the desired area without requiring complex manufacturing procedures.
2Ease of manufacture
If the electrode width is uniform, then the manufacturing process is simple, but light emitting elements cannot be concentrated in the desired area
Solution Approach 1:
The electrode transitions from a uniform width design to an asymmetric width variation design. The first portion has a greater width than the second portion, creating asymmetry that naturally guides light emitting elements to concentrate in the desired first portion area during manufacturing, thereby improving manufacturing precision without significantly complicating the manufacturing process.
Solution Approach 2:
The width parameter of the electrode is changed along its length, with the first portion having a greater width and the second portion having a smaller width. This parameter variation optimizes the concentration of light emitting elements in the desired area while maintaining manufacturing simplicity.
3Ease of operation
If light emitting elements are spaced apart to allow connection space, then connection is easier, but the desired area is not fully utilized and brightness decreases
Solution Approach 1:
The asymmetric width variation of the electrode (greater width in the first portion, smaller width in the second portion) concentrates light emitting elements in the desired first portion area. This allows for sufficient connection space in the second portion while maximizing element density and brightness in the emission area, resolving the contradiction between ease of connection and illumination intensity.
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 approach enhances the display's brightness and efficiency by ensuring light emitting elements are densely packed in desired areas, reducing losses and improving the overall performance of the display device.
Implementation Method 1
utilizing an electric field to guide their arrangement during the manufacturing process
Data Source
AI summary
A display device includes an emission area and a sub-area spaced from the emission area in a first direction, a plurality of electrodes in the emission area and extending in the first direction, the plurality of electrodes being spaced from each other along a second direction crossing the first direction, a first insulating layer on the plurality of electrodes, and a plurality of light emitting elements on the first insulating layer, both ends of the plurality of light emitting elements being on the plurality of electrodes that are spaced from each other along the second direction, wherein the plurality of electrodes include a first electrode including a first portion and a second portion, the second portion of the first electrode having a width measured in the second direction that is smaller than a width of the first portion measured in the second direction.