Display Substrate Light-Transmitting Region Pixel Circuit Merging
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Solution Overview
Problem
Existing display technologies face challenges in achieving high light transmittance and consistent resolution in display substrates, particularly in regions designed for under-display cameras, which affect the screen-to-body ratio and image quality.
Innovation Solution
The display substrate incorporates a light-transmitting display region with a higher light transmittance than conventional regions, featuring a base substrate with light emitting elements and pixel circuits. Each first type pixel circuit is electrically connected to at least two light emitting elements emitting the same color, optimizing light transmission and resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a conventional display region is used in the light-transmitting display region, then the resolution is maintained, but the light transmittance is reduced
Solution Approach 1:
The patent merges multiple light emitting elements of the same color that are driven by a single pixel circuit into one driving unit. This consolidation allows the pixel circuit to control multiple emitters simultaneously, enabling the use of larger emitter areas that improve light transmittance while maintaining resolution through the shared driving control.
Solution Approach 2:
The patent changes the dimensional arrangement by allowing the pixel circuit's orthogonal projection to overlap with the light emitting elements in the vertical dimension. This spatial reconfiguration enables the pixel circuit to be positioned beneath the light emitting elements, facilitating better light transmission while maintaining electrical control.
2Illumination intensity
If the pixel circuit is positioned below the light emitting element, then the light transmittance is improved, but the manufacturing precision becomes more difficult to control
Solution Approach 1:
By combining multiple light emitting elements under a single pixel circuit, the patent reduces the number of separate alignment interfaces. Instead of aligning multiple pixel circuits with multiple elements, only one pixel circuit needs to be aligned with multiple elements of the same color, simplifying the manufacturing process and improving alignment precision.
Solution Approach 2:
The patent applies different structural characteristics to different regions: the light-transmitting display region uses a simplified structure with fewer pixel circuits and larger emitter areas, while the conventional display region maintains the traditional one-to-one mapping. This localized structural optimization improves light transmittance where needed without compromising overall manufacturing precision.
3Illumination intensity
If multiple light emitting elements are driven by one pixel circuit, then the light transmittance is improved, but the device complexity increases
Solution Approach 1:
The patent merges the driving functions for multiple light emitting elements into a single pixel circuit, eliminating the need for separate pixel circuits for each element. This consolidation reduces the total number of circuits while maintaining the ability to drive multiple elements, thereby reducing device complexity rather than increasing it.
Solution Approach 2:
The pixel circuit is designed with multi-functionality to drive multiple light emitting elements of the same color. This universal design allows a single circuit to perform the function of multiple dedicated circuits would have been needed, simplifying the overall device architecture while improving light transmittance.
Data Source
AI summary
Disclosed is a display substrate including a display region which includes a light-transmitting display region; the display substrate includes multiple light emitting elements and multiple pixel circuits, the multiple light emitting elements include multiple first type light emitting elements located in the light-transmitting display region, the multiple pixel circuits include multiple first type pixel circuits located in the light-transmitting display region, at least one first type pixel circuit among the multiple first type pixel circuits is electrically connected with at least two first type light emitting elements emitting light of a same color, and the first type pixel circuit is configured to drive the at least two first type light emitting elements to emit light; an orthographic projection of at least one first type pixel circuit on a base substrate is overlapped with an orthographic projection of at least one first type light emitting element on the base substrate.