Display Substrate Wiring Layout for Under-Display Light Transmission
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Solution Overview
Problem
Current display substrates face challenges in achieving a full-screen design due to the occupation of display regions by components like cameras and light sensors, which hinders light transmission and affects the installation of sensors and other components while maintaining display functionality.
Innovation Solution
A display substrate design with a first side for display and a second side opposite to it, featuring a display region with a light-transmitting first display region and a surrounding second display region, where the first display region allows light transmission to the second side, and includes connection wires with a light-transmitting layer and a metal wiring layer for efficient signal transmission and reduced resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light-transmitting wiring layer is used in the first display region, then light transmittance is improved, but electrical conductivity and signal transmission efficiency deteriorate
Solution Approach 1:
The connection wire is segmented into two distinct portions: a first portion in the light-transmitting display region using a light-transmitting wiring layer, and a second portion in the non-light-transmitting display region using a metal wiring layer. This segmentation allows each portion to be optimized for its specific functional requirement.
Solution Approach 2:
Different wiring materials are applied to different regions based on local requirements: the first portion uses a light-transmitting wiring layer (such as ITO, IZO, or IGZO) in the light-transmitting display region to maintain high light transmittance, while the second portion uses a metal wiring layer (such as Al, Mo, or Ti) in the non-light-transmitting display region to provide low resistance and efficient signal transmission.
Solution Approach 3:
The connection wire is formed as a composite structure combining two different materials: a light-transmitting wiring layer material and a metal wiring layer material. This composite structure allows the connection wire to simultaneously achieve both high light transmittance in the first display region and low resistance in the second display region.
2Adaptability or versatility
If display regions are occupied by cameras and light sensors, then device functionality is improved, but light transmission to the second side is blocked
Solution Approach 1:
The display region is segmented into a first display region with light-transmitting properties and a second display region with non-light-transmitting properties. This segmentation allows the light-transmitting first display region to enable sensor installation on the second side while the second display region maintains normal display functionality.
Solution Approach 2:
Different optical properties are applied to different regions: the first display region uses a light-transmitting wiring layer to allow light transmission to the second side for sensor installation, while the second display region uses a metal wiring layer that does not transmit light, maintaining normal display functionality in that area.
3Reliability
If a metal wiring layer is used throughout the display, then electrical conductivity is improved, but light transmittance in the first display region deteriorates
Solution Approach 1:
The wiring structure is segmented into two portions with different materials: the first portion uses a light-transmitting wiring layer in the first display region, and the second portion uses a metal wiring layer in the second display region. This segmentation allows each material to be used where it provides the most benefit.
Solution Approach 2:
Different wiring materials are applied to different regions based on local requirements: the light-transmitting wiring layer is used in the first display region where light transmission is critical, while the metal wiring layer is used in the second display region where electrical conductivity is the priority.
Data Source
AI summary
A display substrate and a manufacturing method thereof are provided. The display substrate has a first side for display and a second side opposite to the first side, and the display substrate includes a display region, the display region includes a first display region and a second display region, and the first display region allows light from the first side to be at least partially transmitted to the second side; and the display substrate further includes at least one first connection wire in both of the first display region and the second display region, the first connection wire includes a first portion in the first display region and a second portion in the second display region, the first portion and the second portion are electrically connected with each other, the first portion includes a first light-transmitting wiring layer, and the second portion includes a metal wiring layer.