Display Substrate Initialization Lines for Under-Display Camera Tint Control
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Solution Overview
Problem
The under-display camera technology in smartphones results in purple display defects due to unequal lighting times of red, green, and blue subpixels in the first display area, caused by prolonged ITO wires leading to inconsistent charging times.
Innovation Solution
A display substrate design with separate initialization voltage lines for each subpixel, allowing different initialization voltages to be applied to the first, second, and optionally third subpixels, ensuring consistent charging times by adjusting the voltage levels to match the lighting times of red, green, and blue subpixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If separate initialization voltage lines are applied to different subpixels, then the lighting time consistency is improved, but the device complexity increases
Solution Approach 1:
The patent divides the initialization voltage supply system into separate lines for different subpixels. Specifically, the first subpixel (red) is connected to a first initialization voltage line, while the second subpixel (green) is connected to a second initialization voltage line, allowing independent voltage control for each subpixel type to achieve consistent lighting times
Solution Approach 2:
The patent applies different initialization voltages to different subpixel regions based on their specific characteristics. The first initialization voltage is applied to the first subpixel and the second initialization voltage is applied to the second subpixel, creating localized voltage conditions optimized for each subpixel's lighting behavior
2Illumination intensity
If the first display area has higher light transmittance for under-display camera, then the camera functionality is improved, but the display uniformity deteriorates
Solution Approach 1:
The patent creates a first display area with higher light transmittance specifically for under-display camera functionality, while maintaining a second display area with standard characteristics. This localized modification allows the camera to function through the display without compromising the overall display quality in other regions
Solution Approach 2:
The patent divides the display area into a first display area (with higher transmittance for camera) and a second display area (with standard transmittance), allowing different optical properties in different regions to simultaneously satisfy camera requirements and display uniformity requirements
Data Source
AI summary
Embodiments of the present disclosure provide a display substrate, a driving method therefor, and a display apparatus. The display substrate has a display area and a bezel area. The display area includes a first display area and a second display area. The first display area has a light transmittance higher than that of the second display area. The first display area includes a plurality of pixel units distributed in an array, each pixel unit including a first subpixel and a second subpixel emitting different colors of light. The first display area includes a first initialization voltage line and a second initialization voltage line. The first initialization voltage line is electrically connected to the first subpixel, the second initialization voltage line is electrically connected to the second subpixel, and the first initialization voltage line and the second initialization voltage line are configured to receive different initialization voltages.