Display Substrate Circuit Layout for Uniform Under-Screen Brightness
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Solution Overview
Problem
Existing display technologies face challenges in achieving uniform brightness across different areas of a display substrate, particularly in areas designed for both image display and light transmission, such as under-screen cameras.
Innovation Solution
The display substrate incorporates a first display area for image display and a second display area for both image display and light transmission, featuring a compensation capacitor plate in the first circuit unit and an anode connection line in the second circuit unit, ensuring that both areas maintain consistent brightness when driven by the same data voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the second display area is designed for both image display and light transmission (e.g., under-screen camera function), then the light transmission capability is improved, but brightness uniformity deteriorates due to different structures between first and second display areas
Solution Approach 1:
The patent applies local quality by differentiating the circuit configurations between the first display area (image display only) and second display area (image display + light transmission). Specifically, the first circuit unit includes a compensation capacitor plate connected to the first anode electrode, while the second circuit unit includes an anode connection line connecting the second anode electrode to the light emitting device. This localized structural differentiation allows each area to be optimized for its specific function while maintaining overall brightness uniformity through coordinated design of these local structures.
Solution Approach 2:
The patent employs parameter changes by adjusting the electrical connection parameters between the pixel drive circuit and light emitting devices in different display areas. The first anode electrode is directly connected to the light emitting device, while the second anode electrode is connected through an anode connection line. This parameter modification in the connection structure enables the second display area to achieve both light transmission and image display functions with uniform brightness characteristics.
2Adaptability or versatility
If different circuit configurations are used in first and second display areas to achieve their respective functions, then functional versatility is improved, but device complexity increases due to multiple circuit unit types
Solution Approach 1:
The patent applies segmentation by dividing the display substrate into distinct first and second display areas with different circuit configurations. The first display area uses first circuit units with compensation capacitor plates optimized for image display, while the second display area uses second circuit units with anode connection lines optimized for both image display and light transmission. This segmentation allows each region to be independently optimized for its specific functional requirements.
Solution Approach 2:
The patent implements universality by designing the second circuit unit with an anode connection line that enables the second display area to serve multiple functions - both image display and light transmission (e.g., for under-screen cameras). This multi-functional design allows the same basic circuit structure to support different operational modes, reducing the need for entirely separate circuit systems for different functions.
Data Source
AI summary
A display substrate, a manufacturing Method therefor, and a display apparatus are disclosed. The display substrate includes a first display area (100) and a second display area (200), the first display area (100) includes a plurality of first light emitting devices (LD1), a plurality of first circuit units (QD1) and at least one second circuit unit (QD2), and the second display area (200) includes a plurality of second light emitting devices (LD2); the first circuit unit (QD1) includes at least a first anode electrode (51) connected to the first light emitting device (LD1) and a compensation capacitor plate (60) connected to the first anode electrode (51), the compensation capacitor plate (60) is configured to form a compensation capacitor; the second circuit unit (QD2) includes at least a second anode electrode (52), which is connected to the second light emitting device (LD2) through an anode connection line (70).