Transparent Display Panel Light-Blocking Layout for Misalignment Tolerance
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Solution Overview
Problem
In transparent display panels, the light-blocking layer often deviates from its target position due to misalignment during manufacturing, leading to incomplete coverage of metal lines and increased reflectivity.
Innovation Solution
A display panel design where the light-blocking layer is strategically placed between adjacent light-emitting elements and covers the top edges of light-emitting and light-transmitting parts, as well as metal parts adjacent to the light-transmitting regions, to effectively reduce reflectivity and improve alignment reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the light-blocking layer is positioned using conventional lithography alignment, then the manufacturing process is simple, but the light-blocking layer deviates from target position causing incomplete coverage of metal lines
Solution Approach 1:
The light-blocking layer is designed to extend beyond the metal lines in advance, creating an overlapping structure that ensures complete coverage even when alignment deviations occur during manufacturing. This preliminary extension action compensates for potential positioning errors without requiring ultra-precise alignment.
Solution Approach 2:
The light-blocking layer is divided into multiple segments: a first light-blocking layer covering metal lines in the first non-light-transmitting region, and a second light-blocking layer covering metal lines in the second non-light-transmitting region. This segmentation allows each layer to be optimized independently for its specific alignment requirements.
2Object-affected harmful factors
If the light-blocking layer covers only the metal lines, then the structure is simple, but misalignment causes incomplete shading and high reflectivity
Solution Approach 1:
The light-blocking layer is designed with different extension characteristics in different regions: in the first non-light-transmitting region, it extends to cover adjacent metal lines, while in the second non-light-transmitting region, it extends to cover metal lines with different spacing requirements. This local quality adjustment optimizes light blocking efficiency without uniformly increasing material quantity.
Solution Approach 2:
The light-blocking layer intentionally extends beyond the minimum required coverage area, creating an excessive action that ensures complete coverage of metal lines even with alignment deviations. This partial over-coverage prevents harmful light reflection while the material quantity is controlled through optimized extension distances.
3Reliability
If the light-blocking layer is aligned precisely with metal lines, then coverage is complete, but any misalignment during manufacturing causes shading failures
Solution Approach 1:
The light-blocking layer is designed with an extended width that creates a cushion zone beyond the metal lines. This beforehand cushioning ensures that even if lithography alignment deviates within a certain range, the light-blocking layer still completely covers the metal lines, thereby cushioning against alignment errors and improving reliability.
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 design significantly reduces the reflectivity of the display panel by ensuring complete coverage of metal parts and maintaining the structural integrity of light-emitting elements, even with misalignment during manufacturing.
Implementation Method 1
a light-blocking layer for covering the metal lines. However, in the actual process, the light-blocking layer may deviate from its target position due to factors such as a misalignment of a lithography machine
Data Source
AI summary
Provided are a display panel, a method for manufacturing a display panel, and a display apparatus. The display panel has a display region including light-transmitting regions and non-light-transmitting regions. The display panel includes light-emitting elements located in the non-light-transmitting regions; light-transmitting parts at least partially located in the light-transmitting region; and a light-blocking layer located in the non-light-transmitting regions. A part of the light-blocking layer is located between adjacent light-emitting elements in a same non-light-transmitting region. The light-blocking layer covers a top edge of one or more of the light-emitting elements, or the light-blocking layer covers a top edge of one or more of the light-transmitting parts, or the light-blocking layer covers one or more of first metal parts adjacent to the light-transmitting regions.