Display Substrate Scattering Microstructures Eliminate Light Guide Plate
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Solution Overview
Problem
Conventional liquid crystal display devices require a thick and costly light guide plate for backlighting, making them difficult to achieve an ultrathin appearance and low cost, especially in portable devices where space and cost constraints are stringent.
Innovation Solution
A display substrate with scattering microstructures, such as protrusions and grooves, on its lower surface that scatters incident light into a surface light source, eliminating the need for a light guide plate by converting lateral or lower surface incident light into a uniform surface light source for emission, thereby reducing thickness and production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light guide plate is used to convert linear or spot light sources into surface light sources, then luminance uniformity is improved, but device thickness and cost increase
Solution Approach 1:
The patent merges the light guide plate function with the display substrate by forming scattering microstructures directly on the lower surface of the substrate. This integration eliminates the need for a separate light guide plate while maintaining the light scattering and uniform distribution functions, thereby reducing device thickness without compromising luminance uniformity
Solution Approach 2:
The display substrate is designed to perform multiple functions: it serves as both the structural base for display elements and the light guide component. By incorporating scattering microstructures into the substrate, it simultaneously provides mechanical support, electrical isolation, and optical light distribution, eliminating the need for dedicated light guide plate components
2Illumination intensity
If a light guide plate is used to convert linear or spot light sources into surface light sources, then luminance uniformity is improved, but manufacturing cost increases
Solution Approach 1:
The patent merges the light guide plate function with the display substrate by forming scattering microstructures directly on the lower surface of the substrate. This integration eliminates the need for a separate light guide plate while maintaining the light scattering and uniform distribution functions, thereby reducing device thickness without compromising luminance uniformity
Solution Approach 2:
The display substrate is designed to perform multiple functions: it serves as both the structural base for display elements and the light guide component. By incorporating scattering microstructures into the substrate, it simultaneously provides mechanical support, electrical isolation, and optical light distribution, eliminating the need for dedicated light guide plate components
3Length of stationary object
If scattering microstructures are formed on the substrate, then the light guide plate is eliminated and thickness is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The patent employs a layer of particles with specific size ranges (0.1-10 μm) on the lower surface of the substrate. These particles create scattering microstructures that effectively diffuse light while being manufacturable through conventional coating techniques, balancing optical performance with manufacturing feasibility
Solution Approach 2:
The patent specifies optimal particle size parameters (0.1-10 μm diameter) to achieve effective light scattering. By controlling particle size within this range, the system achieves sufficient light diffusion without requiring ultra-precise microfabrication, thus reducing manufacturing precision requirements while maintaining thin profile
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 a more uniform luminance and improved displaying effect without the need for a light guide plate, resulting in a thinner and more cost-effective display device with enhanced portability and performance.
Implementation Method 1
The lower surface of the base is formed with scattering microstructures. The scattering microstructures scatter light which is incident from the lower surface or a lateral side of the base
Data Source
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AI summary
A substrate for display, a display panel and a display device are provided. The substrate for display comprises a base (200) comprising an upper surface (202) and a lower surface (203) which are opposite to each other. The lower surface (203) of the base (200) is formed with scattering microstructures (205), and the upper surface (202) of the base (200) is formed with a layer structure for display, thereby achieving ultrathin appearance and low cost of the display device.