Quantum Dot Display Layout for Light Leakage and Efficiency
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Solution Overview
Problem
Conventional display devices utilizing quantum dots for enhanced color saturation face issues with light leakage and poor luminous efficiency due to the non-directive nature of converted light, leading to incomplete utilization of quantum dots.
Innovation Solution
A display device design featuring a substrate with an insulating layer, a light blocking layer, and a light conversion element, where the light emitting element is positioned within openings in the insulating layer, and the light conversion element is disposed on top, allowing for improved light utilization and reduced leakage by reflecting converted light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If quantum dot materials are applied to convert excitation light, then color saturation is improved, but luminous efficiency deteriorates due to lateral leakage of converted light
Solution Approach 1:
A light reflective layer is introduced as an intermediary component between the substrate and the quantum dot layer. This reflective layer acts as a mediator to redirect laterally emitted converted light back toward the light emitting element, preventing energy loss while preserving the color conversion function of the quantum dots
Solution Approach 2:
The invention converts the harmful lateral leakage of converted light into a beneficial effect by using the reflective layer to redirect this otherwise wasted light back to the light emitting element, thereby transforming energy loss into useful light output that enhances luminous efficiency
2Device complexity
If conventional light emitting elements are used, then device structure is simple, but light utilization is poor due to lack of directivity in converted light
Solution Approach 1:
The light reflective layer serves as an intermediary that redirects light paths without requiring complex changes to the light emitting element itself, maintaining structural simplicity while improving light utilization through optical path management
Solution Approach 2:
The reflective layer utilizes the vertical dimension (z-axis) to redirect laterally emitted light back upward toward the light emitting element, adding a dimensional aspect to light path control that improves efficiency without complicating the horizontal device structure
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 configuration enhances light utilization and efficiency, ensuring that quantum dots are fully utilized, thereby improving the luminous efficiency and color saturation of the display device.
Implementation Method 1
Quantum dots can convert excitation light emitted by a light emitting element into the converted light of desired color, and the converted light of different colors can be generated through adjusting sizes of the quantum dots
Implementation Method 2
the converted light generated by the quantum dots doesn't have directivity, so in the conventional display device, leakage or loss of converted light laterally emitted easily occurs
Data Source
AI summary
Disclosed is a display device including a substrate, an insulating layer, a light blocking layer, a light emitting element, and a light conversion element. The insulating layer is disposed on the substrate and includes at least one opening. The light blocking layer is disposed on a top surface of the insulating layer. The light emitting element is disposed in the at least one opening and includes an electrode. The light conversion element is disposed on the light emitting element, wherein the electrode is disposed between the substrate and the light blocking layer.