LED Display Light-Collecting Structure for Leakage and Heat Control
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Solution Overview
Problem
Light emitting display devices face issues with deteriorated luminous efficiency and shortened lifespan due to light leakage and heat generation, particularly in outdoor applications requiring high luminance.
Innovation Solution
A display device structure featuring a substrate with a light collecting structure and reflective layers having a reverse tapered shape to reflect and collect light emitted by LEDs, improving luminous efficiency without increasing current.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If light is emitted from the LED to achieve high luminance, then the luminance is improved, but light leaks to the periphery causing deteriorated luminous efficiency
Solution Approach 1:
The patent converts the harmful light leakage to the periphery into a beneficial effect by introducing a reflective layer that redirects the leaked light back toward the LED chip. The reflective layer transforms what was previously wasted light into useful light that contributes to the overall luminance, thereby improving luminous efficiency while maintaining high luminance output.
Solution Approach 2:
The patent addresses light leakage in the lateral dimension by introducing a reflective layer positioned at the periphery of the LED. This reflective layer captures light that would otherwise escape in the lateral direction and redirects it upward toward the viewing angle, effectively converting lateral light loss into useful vertical light output.
2Illumination intensity
If higher current is applied to the LED to compensate for light loss, then the luminance is maintained, but power consumption increases
Solution Approach 1:
The reflective layer converts previously wasted light energy into useful light output, meaning that the same luminance can be achieved with lower current input. By回收利用 the leaked light, the system reduces the total energy input required to maintain a given luminance level.
3Illumination intensity
If higher current is applied to the LED to compensate for light loss, then the luminance is maintained, but heat generation increases and lifespan shortens
Solution Approach 1:
The reflective layer recovers light energy that would otherwise be wasted, reducing the total energy input required. This energy reduction translates to lower heat generation and reduced thermal stress on the LED chip, thereby improving reliability and extending lifespan.
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 structure enhances light collection efficiency, maintains high luminance, and extends the lifespan of the LEDs by minimizing light leakage and heat accumulation.
Implementation Method 1
a reflective layer disposed on a side surface of the light collecting structure... the side surface of the light collecting structure has a reverse tapered shape
Data Source
AI summary
A display device and a manufacturing method of a display device are provided. The display device includes a substrate including a pixel defined thereon; a light emitting diode disposed in the pixel; an insulating layer covering the light emitting diode; a light collecting structure on at least a part of the insulating layer; and a reflective layer disposed at a side surface of the light collecting structure. The side surface of the light collecting structure may have a reverse tapered shape.