Display Substrate Optical Structure Viewing Angle Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display technologies require additional privacy films that increase cost and module thickness, and struggle to control viewing angles effectively, especially in office and vehicle environments where reflection prevention is necessary.
Innovation Solution
A display substrate with an integrated optical structure featuring light-shielding patterns and transparent patterns, which controls the emergent angle of light to within a predetermined range, eliminating the need for external privacy films and reducing module thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If additional privacy films are used to control viewing angles, then privacy displaying is achieved, but module thickness and cost increase
Solution Approach 1:
The patent merges the privacy film function with the display substrate by integrating light-shielding patterns directly into the substrate structure. The light-shielding patterns are formed as part of the substrate manufacturing process, combining multiple functions (substrate support and viewing angle control) into a single integrated component, thereby eliminating the need for separate privacy films and reducing overall module thickness.
Solution Approach 2:
The patent extracts the privacy control function from the separate privacy film layer and relocates it to the display substrate itself. By taking out the viewing angle control mechanism from the external film and embedding it within the substrate through light-shielding patterns, the design eliminates the need for additional thickness while maintaining privacy displaying capability.
2Object-affected harmful factors
If additional privacy films are used to control viewing angles, then privacy displaying is achieved, but manufacturing cost increases
Solution Approach 1:
The patent combines the privacy film manufacturing process with the display substrate manufacturing process. The light-shielding patterns are formed using the same photolithography and etching steps already required for substrate fabrication, merging two separate manufacturing processes into one. This integration eliminates the need for purchasing, handling, and laminating separate privacy films, thereby reducing manufacturing cost.
Solution Approach 2:
The display substrate is designed to serve multiple functions: structural support, electrical insulation, and viewing angle control through integrated light-shielding patterns. This multi-functionality reduces the total component count and eliminates the need for separate privacy films, simplifying the bill of materials and reducing overall manufacturing cost.
3Object-affected harmful factors
If light-shielding patterns are added to control emergent angles, then viewing angle is controlled, but substrate complexity increases
Solution Approach 1:
The patent segments the substrate into distinct functional regions: transparent regions for light transmission and light-shielding patterns for viewing angle control. This segmentation is achieved through photolithographic patterning that divides the substrate surface into optically active areas and controlled emission areas, allowing independent optimization of each region's function while maintaining overall substrate integrity.
Solution Approach 2:
The patent applies local quality by creating light-shielding patterns with specific geometric characteristics (width, spacing, depth) in predetermined locations on the substrate. These localized structural modifications provide viewing angle control only in specific areas where needed, while other areas maintain full transparency for light transmission, thereby controlling complexity through spatially selective functionality.
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
The solution achieves privacy displaying at a lower cost and prevents reflections on vehicle windshields by controlling light emission angles, thereby enhancing display device performance and reducing overall thickness.
Implementation Method 1
An extending direction of each light-shielding pattern is perpendicular to a first plane. The first plane is parallel to the base substrate... an emergent angle of an emergent light via the optical structure at the first plane is smaller than a threshold Θ, a height of the light-shielding pattern is h, and a distance between adjacent light-shielding patterns is b, where Θ=arctan(b/h)
Data Source
AI summary
A display substrate and a forming method thereof, a display panel and a display device are provided. The display substrate includes: a base substrate, a display functional layer on the base substrate, and an optical structure arranged at a side of the base substrate. The optical structure is used to control an emergent angle of light from the display functional layer to be within a predetermined angle range.