Double-Face OLED Substrate with Overlapping Light Emitting Structures
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Solution Overview
Problem
OLED display substrates can only display images on one side, resulting in poor display performance, and double-face OLED substrates have low resolution.
Innovation Solution
A display substrate with a light transmissive base and dual light emitting structures that emit light towards different directions, with overlapping orthographic projection regions to minimize the orthographic projection area and increase pixel density, allowing for double-face display with high resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional OLED display substrate with single light emitting structure is used, then the manufacturing process is simple, but the display can only be viewed from one side resulting in poor display performance
Solution Approach 1:
The display substrate is segmented into multiple light emitting structures (first light emitting structure and second light emitting structure) that emit light in different directions. Each light emitting structure is independently configured to emit light towards different sides, enabling multi-directional display capability while maintaining manageable complexity through modular design
Solution Approach 2:
The patent transitions from single-sided display to double-sided display by adding another dimension of light emission. The first light emitting structure emits light towards one side while the second light emitting structure emits light towards the opposite side, effectively utilizing both faces of the substrate for display purposes
2Adaptability or versatility
If double-face OLED substrates are used to achieve display on both sides, then the display versatility is improved, but the resolution becomes low
Solution Approach 1:
The patent merges the functional regions of the first and second light emitting structures by making their orthographic projections overlap on the base substrate. This overlapping arrangement allows both light emitting structures to share the same physical space footprint, effectively doubling the display area without increasing the substrate area, thereby maintaining high resolution
Solution Approach 2:
The patent resolves the resolution issue by utilizing the third dimension (depth/layering) to accommodate both light emitting structures. Instead of placing them side-by-side which would double the area and reduce resolution, the structures are stacked in layers with overlapping projections, maintaining high pixel density while achieving double-sided display
3Manufacturing precision
If the orthographic projection regions of first and second light emitting structures are made to overlap, then the pixel density increases and resolution improves, but the structural complexity increases
Solution Approach 1:
The patent applies a nested doll principle where the second light emitting structure is positioned within the orthographic projection region of the first light emitting structure. This nesting arrangement allows both structures to occupy overlapping space efficiently, maximizing pixel density while organizing the complex structure in a hierarchical manner that simplifies manufacturing alignment
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
The dual light emitting structures enable double-face display with improved resolution by maximizing pixel density and reducing the orthographic projection area on the base substrate, enhancing the display performance of OLED display apparatuses.
Implementation Method 1
the first light emitting structure is configured to emit light towards a direction proximal to the base substrate
Implementation Method 2
the second light emitting structure is configured to emit light towards a direction distal from the base substrate
Implementation Method 3
the base substrate is light transmissive
Data Source
AI summary
The present disclosure provides a display substrate and a method for manufacturing the same, a display panel and a display apparatus. The display substrate includes: a light transmissive base substrate and a pixel unit, the pixel unit includes: a first light emitting structure and a second light emitting structure that are arranged in sequence along a direction distal from the base substrate; the first light emitting structure is configured to emit light towards a direction proximal to the base substrate, and the second light emitting structure is configured to emit light towards a direction distal from the base substrate; an orthographic projection region of the first light emitting structure on the base substrate at least partially overlaps an orthographic projection region of the second light emitting structure on the base substrate. The display panel according to the present disclosure can implement double-face display, and achieves a high resolution.