Light Emitting Substrate Reflective Pattern Layout for Uniform Brightness
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Solution Overview
Problem
Existing mini LED displays face challenges in optical mixing and uniform brightness due to high optical distances and distinct boundaries between light emitting regions, leading to uneven brightness and poor optical mixing effects.
Innovation Solution
A light emitting substrate design featuring protective structures with reflective patterns arranged on their sides, where the reflective patterns' orthographic projections cover the light emitting units, reducing optical distance and enhancing light reflection and distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the number of light emitting units is increased to improve brightness uniformity, then optical mixing effect is improved, but device complexity and production cost increase
Solution Approach 1:
The patent introduces reflective patterns as intermediary elements between the light emitting units and the display panel. These reflective patterns redirect light from fewer, strategically positioned light emitting units to achieve uniform brightness across the display area, eliminating the need to increase the number of light emitting units while maintaining optical mixing effectiveness
Solution Approach 2:
The patent changes the optical parameters of the system by introducing reflective surfaces with specific reflectivity characteristics. By adjusting the reflectivity, position, and orientation of these patterns, the light distribution is optimized to achieve uniform brightness without adding more light emitting units, thus resolving the contradiction between brightness uniformity and device complexity
2Use of energy by moving object
If the optical distance is increased to improve light emission, then light emitting efficiency is improved, but optical mixing effect deteriorates
Solution Approach 1:
The patent addresses the optical distance issue by introducing reflective patterns that create additional light paths through reflection. This adds a dimensional aspect to light propagation, allowing light to reach different areas of the display panel through multiple reflections rather than direct linear paths, thereby improving optical mixing without requiring increased optical distance
Solution Approach 2:
The reflective patterns ensure continuous light distribution across the display panel by repeatedly redirecting light throughout the optical path. This continuous redirection maintains effective optical mixing even when the physical optical distance is limited, resolving the contradiction between light emitting efficiency and optical mixing effect
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 design improves optical mixing effects, achieves uniform brightness across the substrate, and reduces thickness without increasing the number of light emitting units, while potentially lowering production costs.
Implementation Method 1
a plurality of reflective patterns located at side of the plurality of protective structures facing away from the plurality of light emitting units
Data Source
AI summary
Provided are a light emitting substrate, a method for manufacturing same, and a display apparatus. The light emitting substrate includes a base substrate; a plurality of light emitting units located at a side of the base substrate; a plurality of protective structures located at a side of the plurality of light emitting units facing away from the base substrate; the plurality of protective structures each covers a respective one of the plurality of light emitting units; and a plurality of reflective patterns located at a side of the plurality of protective structures facing away from the plurality of light emitting units; orthographic projections of the plurality of reflective patterns on the base substrate fall within orthographic projections of the plurality of protective structures on the base substrate.