OLED Display Substrate Layout for Under-Display Camera Wiring
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Solution Overview
Problem
Existing display technologies face challenges in integrating an under-display camera technology without compromising the display effect, particularly in avoiding short circuits and maintaining aperture ratios in OLED and QLED devices.
Innovation Solution
A display substrate design with alternating first and second pixel circuits, utilizing transparent conductive lines and adapter holes to connect light emitting elements, and employing planarization layers to avoid short circuits and maintain aperture ratios, allowing for efficient wiring and expanded display regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pixel circuits and light emitting elements are arranged in traditional configurations, then wiring space is limited, but short circuits between adjacent light emitting elements may occur
Solution Approach 1:
The display region is divided into a first display region and a second display region, with pixel circuits and light emitting elements arranged in distinct zones. This segmentation allows for separate wiring paths in each region, preventing short circuits while maintaining wiring efficiency.
Solution Approach 2:
The patent employs asymmetric arrangements where first pixel circuits connect to first light emitting elements through first transparent conductive lines, while second pixel circuits connect to second light emitting elements through second transparent conductive lines with different routing. This asymmetric wiring strategy prevents short circuits by ensuring that wiring from different pixel circuits do not intersect or come into contact.
2Productivity
If adapter holes are positioned to connect pixel circuits with light emitting elements, then wiring efficiency improves, but aperture ratios may be compromised
Solution Approach 1:
The patent implements local quality by creating different connection configurations for different regions. First adapter holes are provided in the first planarization layer for first pixel circuit connections, while second adapter holes are provided in the second planarization layer for second pixel circuit connections. This localized differentiation allows efficient wiring in each region while maintaining appropriate aperture ratios.
Solution Approach 2:
The patent utilizes vertical layering to resolve the aperture ratio issue. Instead of placing all adapter holes in a single plane, the design distributes them across multiple planarization layers (first and second planarization layers). This three-dimensional arrangement allows wiring to pass through different vertical levels, improving wiring efficiency without compromising the horizontal aperture ratio of the display.
3Area of stationary object
If display region is expanded to increase screen-to-body ratio, then under-display camera integration becomes challenging, but display effectiveness is improved
Solution Approach 1:
The display is segmented into first and second display regions with different functional characteristics. The first display region contains first pixel circuits and first light emitting elements, while the second display region contains second pixel circuits and second light emitting elements. This segmentation allows flexible configuration to accommodate under-display camera sensors while maintaining overall display effectiveness.
Solution Approach 2:
The patent creates a universal display structure that can serve multiple functions. The alternating arrangement of first and second pixel circuits with their respective light emitting elements and adapter holes provides a flexible framework that accommodates both display requirements and under-display camera integration, making the design adaptable to different application scenarios.
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 design enhances display effectiveness by preventing short circuits and maintaining aperture ratios, enabling efficient use of wiring space and expanding the display area without compromising the functionality of under-display cameras.
Implementation Method 1
a light emitting element located on a side of the pixel circuit away from the base substrate, The light emitting element includes a first light emitting element located in the first display region and a second sub-light emitting element and a third sub-light emitting element located in the second display region
Implementation Method 2
The first pixel circuit is electrically connected with the first light emitting element through at least a part of a transparent conductive line
Data Source
AI summary
Disclosed is a display substrate, including a first display region (A1) and a second display region (A2) at least partially surrounding the first display region (A1). The display substrate includes a base substrate (30), a pixel circuit, and a light emitting element. The pixel circuit is located on the base substrate (30) of the second display region (A2), and the pixel circuit includes a first pixel circuit (11) and a second pixel circuit (12) arranged alternately. The light emitting element is located on a side of the pixel circuit away from the base substrate (30), and the light emitting element includes a first light emitting element (EL1) located in the first display region (A1) and a second sub-light emitting element and a third sub-light emitting element located in the second display region (A2).