Display Substrate Positioning Mark via Reflectance Contrast
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing display device production process is complicated and costly due to the need for a blank region on the substrate for positioning marks, which causes light leakage and does not align with the trend of narrow or frameless display devices.
Innovation Solution
A display substrate with a first and second pattern formed on one side, where the first pattern has a through hole acting as a positioning mark, utilizing different reflectance materials to allow for reflected light detection without requiring a separate treatment for light leakage prevention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a blank region is reserved on the substrate for positioning marks, then the positioning function is achieved, but light leakage occurs and additional light leakage prevention processing is required
Solution Approach 1:
The patent changes the optical parameters of the positioning mark by using materials with different reflectances. The first pattern uses a light-reflecting material while the second pattern uses a light-absorbing material, creating high contrast without requiring a blank region. This resolves the light leakage issue while maintaining positioning accuracy.
Solution Approach 2:
The patent employs composite material structures where the first pattern and second pattern are formed of materials with different reflectances. This composite approach allows the positioning mark to be clearly distinguishable through reflected light detection without creating light leakage problems associated with blank regions.
2Measurement precision
If a blank region is reserved for positioning marks, then positioning is enabled, but the production process becomes complicated and costs increase
Solution Approach 1:
The patent merges the positioning mark function with the existing first and second patterns that are already part of the display substrate structure. By forming the positioning marks using the same patterning processes as the display structures themselves, the solution eliminates additional production steps and reduces overall process complexity.
Solution Approach 2:
The first pattern and second pattern serve dual functions: they are both display structures and positioning marks. This multi-functionality eliminates the need for separate positioning mark structures and their associated processing steps, thereby simplifying the production process.
3Measurement precision
If a blank region is reserved for positioning marks, then positioning function is achieved, but it does not conform to narrow frame or frameless display trends
Solution Approach 1:
The patent applies local quality by creating positioning marks with distinct optical properties (different reflectances) at specific locations within the display substrate. The first pattern with light-reflecting material and the second pattern with light-absorbing material create localized high-contrast features that enable precise positioning without requiring additional frame space.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach simplifies the production process, reduces costs, and aligns with the trend of narrow or frameless display devices by eliminating the need for a transparent region and additional processing steps for light leakage prevention.
Implementation Method 1
The first pattern and the second pattern are formed of materials having different reflectances. The first through hole serves as a positioning mark on a first side of the substrate for positioning the first side of the substrate.
Data Source
AI summary
The present disclosure provides a display substrate, a display device and a method for recognizing a positioning mark. The display substrate includes a substrate, and a first pattern and a second pattern formed on a first side of the substrate; the second pattern is disposed between the first pattern and the substrate, and the first pattern has a first through hole directly facing the second pattern; the first pattern and the second pattern are formed of materials having different reflectances, and the first through hole serves as a positioning mark on a first side of the substrate for positioning the first side of the substrate.