Display Substrate Wiring Layout for Under-Display Sensor Transmittance
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Solution Overview
Problem
Current display technologies face challenges in achieving a high screen-to-body ratio due to the need to accommodate components like cameras and light sensors, leading to reduced light transmittance and visual experience, especially in areas where pixels per inch (PPI) must be lowered to allow for camera placement.
Innovation Solution
A display substrate design featuring a first display area with a sub-pixel array, connection lines, and transfer electrodes, where the wiring space is minimized by overlapping orthographic projections of transfer electrodes and connection lines, allowing for improved light transmittance and aperture ratio, enabling sensors to be integrated without compromising display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the screen-to-body ratio is increased to achieve full-screen display, then the visual experience is improved, but the light transmittance is reduced due to the need to accommodate camera and sensor components
Solution Approach 1:
The patent moves the camera and sensor components from the front display area to the back side of the display substrate, utilizing the z-dimension (depth) to resolve the conflict between full-screen display and component placement. This allows the front surface to maintain high light transmittance while the back side accommodates the necessary components.
Solution Approach 2:
The display substrate is designed with multiple functional layers stacked vertically, where the light-transmitting region on the front allows light to pass through to sensors and cameras positioned on the back side. The wiring layers are nested between the display elements and the sensors, creating a compact multi-functional structure.
2Ease of manufacture
If wiring lines are arranged in separate layers without overlapping, then the manufacturing process is simplified, but the aperture ratio and light transmittance are reduced
Solution Approach 1:
The patent combines multiple wiring functions into overlapping regions where transfer electrodes and connection lines are positioned in different layers but occupy the same planar space. This vertical stacking allows the aperture ratio to be increased while maintaining all necessary electrical connections through the multi-layer structure.
Solution Approach 2:
Instead of arranging all wiring lines in the same plane, the patent utilizes multiple vertical layers to route different signal and power lines. This three-dimensional wiring approach allows overlapping projections in the planar view while maintaining electrical isolation through layer separation, thereby increasing the aperture ratio.
3Adaptability or versatility
If pixels per inch are reduced in certain areas to accommodate camera placement, then the camera integration is simplified, but the display quality is degraded
Solution Approach 1:
The patent relocates the camera and sensors to the back side of the display substrate, allowing the front display surface to maintain uniform high-resolution pixel density across the entire area. This eliminates the need for low-PPI regions while still enabling camera integration through the light-transmitting structure.
Data Source
AI summary
A display substrate and a display apparatus are provided, including a first side for displaying and a second side opposite the first side, a base substrate, a display area, at least one connection line and at least one transfer electrode. Each of the at least one connection line at least partially extends in a first direction and is connected to first power lines respectively connected to adjacent first pixel unit groups in a first display area in the first direction; and each of the at least one transfer electrode at least partially extends in the first direction and is connected to first signal lines that are respectively connected to the adjacent first pixel unit groups in the first display area in the first direction, film layers where at least part of the at least one transfer electrode and each of the at least one connection line are located are different.