Display Substrate Power Routing for High-Transmittance Camera Regions
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Solution Overview
Problem
Existing OLED display substrates face challenges in achieving high light transmittance, particularly in regions where cameras are disposed under the display to enhance screen-to-body ratios, necessitating improved performance for image capture.
Innovation Solution
The display substrate is designed with a first display region having a higher light transmittance than a second region, featuring a reduced density of power lines and a specific arrangement of sub-pixels and power lines, including a 7T1C pixel circuit with optimized power line connections to minimize line occupancy and enhance light transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power lines are densely arranged to ensure adequate power supply to all sub-pixels, then power supply reliability is improved, but light transmittance deteriorates
Solution Approach 1:
The display region is divided into a first display region with lower power line density and a second display region with higher power line density. This segmentation allows different areas to have different power supply configurations tailored to their specific needs, enabling high light transmittance in the first region while ensuring adequate power supply in the second region.
Solution Approach 2:
Different display regions are assigned different power line densities according to their functional requirements. The first display region uses lower power line density to maximize light transmittance for camera placement, while the second display region uses higher density to ensure sufficient power supply, creating local optimization throughout the display.
2Illumination intensity
If power line density is reduced to improve light transmittance, then light transmittance is improved, but power supply capability deteriorates
Solution Approach 1:
The display is segmented into regions with different power line densities. The first display region has reduced power line density to enhance light transmittance for camera functionality, while the second display region maintains higher power line density to ensure adequate power supply capability, thus balancing both requirements through spatial segmentation.
Solution Approach 2:
Power line density is locally optimized based on regional requirements: the first display region employs lower density to maximize light transmission, while the second display region employs higher density to ensure sufficient power delivery, achieving local quality differentiation that resolves the contradiction between light transmittance and power supply capability.
3Ease of manufacture
If uniform power line arrangement is used across the display, then manufacturing simplicity is improved, but light transmittance performance deteriorates
Solution Approach 1:
Rather than using a uniform power line arrangement throughout the display, the patent segments the display into different regions with different power line densities. This segmentation sacrifices some manufacturing simplicity but achieves superior light transmittance performance in the first display region, which is critical for camera functionality.
Solution Approach 2:
The power line arrangement is differentiated by region: the first display region uses a sparser configuration optimized for light transmittance, while the second display region uses a denser configuration. This local quality approach prioritizes light transmittance performance in critical areas over uniform manufacturing simplicity.
Data Source
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AI summary
A display substrate (1) and a display device, which can reduce the number of power lines (22), and improve the light transmittance of a first display region (111). The display substrate (1) includes a first display region (111) and a second display region (112), where a light transmittance of the first display region (111) is higher than that of the second display region (112); the display substrate (1) includes: a plurality of first sub-pixels (21) and a plurality of power lines (22), where the first sub-pixels (21) and the power lines (22) are located in the first display region (111); the first sub-pixels (21) are arranged in an array along a row direction (X) and a column direction (Y); each first sub-pixel (21) comprises a light emitting element and a pixel circuit for driving the light emitting element to emit light; the plurality of power lines (22) are connected to one another; the plurality of power lines (22) comprise at least one of first power lines (221) or second power lines (222), the first power lines (221) are configured to be connected to pixel circuits of the first sub-pixels (21) arranged along the row direction (X), and the second power lines (222) are configured to be connected to pixel circuits of the first sub-pixels (21) arranged in the column direction (Y); a sum of a number of the first power lines (221) and a number of the second power lines (222) is smaller than a sum of a number of rows and a number of columns of the array.