Dummy Pixel Electrode Layout for Uniform Display Spacing
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Solution Overview
Problem
Existing display devices face challenges in maintaining consistent electrode spacing and structure across the display area, leading to variations in pixel performance due to manufacturing process inconsistencies.
Innovation Solution
Incorporating a dummy pixel area with dummy pixels and electrodes surrounding the display area, which have a similar structure to the actual pixels, to maintain consistent electrode spacing and alignment, thereby ensuring uniformity in pixel performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If dummy pixels and dummy electrodes are disposed outside the display area, then electrode spacing and alignment consistency is improved, but device area increases
Solution Approach 1:
The patent divides the electrode structure into two segments: real electrodes within the display area and dummy electrodes in the extension area. This segmentation allows the dummy electrodes to independently maintain spacing consistency without affecting the display area, resolving the contradiction between precision improvement and area increase.
Solution Approach 2:
The patent extends the electrode structure from a two-dimensional display area into a third spatial dimension by adding an extension area. This dimensional extension allows dummy electrodes to be positioned outside the display boundary, maintaining spacing consistency without consuming display area.
2Ease of manufacture
If dummy pixels are formed with the same structure as actual pixels, then manufacturing process uniformity is improved, but device complexity increases
Solution Approach 1:
The patent creates dummy pixels that are simplified copies of actual pixels, containing only the essential electrode and light emitting element structure without full pixel functionality. This copying approach maintains manufacturing process uniformity while reducing the complexity burden of complete pixel replication.
Solution Approach 2:
The dummy pixel structure serves multiple functions: it maintains manufacturing process uniformity across the substrate, provides spacing reference for real pixels, and prevents edge effects. This multi-functionality justifies the added structural complexity by delivering multiple benefits from a single design element.
Data Source
AI summary
A display device comprising a display area in which pixels are disposed, each of the pixels comprising a first electrode and a second electrode; and light emitting elements, a first dummy pixel area disposed outside the display area and in which dummy pixels are disposed, each of the dummy pixels comprising the first electrode, the second electrode and the light emitting elements, and a second dummy pixel area surrounding the display area and the first dummy pixel area and in which dummy electrode lines and dummy electrode patterns are disposed, wherein the dummy electrode lines are spaced apart from each other and are electrically connected to the second electrodes of the dummy pixels, and the dummy electrode patterns are disposed between the dummy electrode lines and are spaced apart from the first electrodes of the dummy pixels.