Mini-LED Reflective Unit Structure for Coating Height Control
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Solution Overview
Problem
Conventional mini-LED light-emitting modules face challenges in controlling the height of reflective coating layers due to their fluidity, leading to fabrication difficulties and ineffective light reflection from lateral sides of mini-light-emitting diodes.
Innovation Solution
The reflective layer is designed with a structure that includes a main body and a reflective part, featuring a retaining wall structure to control the height and material flow, with a reflective surface that gradually increases away from the light-emitting unit, using materials like transparent photosensitive materials and white oil to enhance light reflection efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If reflective coating layers use white oil material with fluidity, then light reflection capability is improved, but height control becomes difficult and fabrication complexity increases
Solution Approach 1:
The reflective coating layer is segmented into multiple sub-layers including a lower reflective sub-layer and an upper reflective sub-layer with different materials and functions. This segmentation allows each sub-layer to be optimized independently for both reflection capability and height control, resolving the contradiction between light reflection and height precision.
Solution Approach 2:
A barrier layer is introduced as an intermediary between the light-emitting diode and the reflective coating layers. This barrier layer serves as a mediator that facilitates precise height control and material containment, enabling the fluid white oil reflective material to be effectively managed while maintaining optimal reflection performance.
2Illumination intensity
If reflective coating layers use white oil material with fluidity, then light reflection capability is improved, but fabrication difficulty increases
Solution Approach 1:
The reflective coating is divided into multiple applicably distinct sub-layers that can be applied using different fabrication techniques optimized for each layer's specific requirements, making the overall fabrication process more manageable despite using fluid materials.
Solution Approach 2:
The barrier layer acts as a mediator that simplifies fabrication by providing a stable foundation and containment structure, allowing the fluid reflective materials to be applied more easily without causing manufacturing complications.
3Stability of the object's composition
If reflective coating layers are made thin for better uniformity, then light mixing distance is reduced, but light reflection from lateral sides becomes ineffective
Solution Approach 1:
The reflective coating is segmented into multiple sub-layers with different thicknesses and materials. The lower sub-layer can be thinner for uniformity while the upper sub-layer compensates for reflection efficiency, allowing both requirements to be satisfied simultaneously through layered architecture.
Solution Approach 2:
The reflective coating uses composite material structure with different materials in different sub-layers, each optimized for specific functions. This composite approach enables the coating to achieve both the thinness required for uniformity and the reflectivity required for effective light reflection.
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 design effectively controls the height of the reflective layer, improving light-emitting efficiency by ensuring that lateral light from mini-LEDs is reflected to the light-emitting surface, enhancing brightness and uniformity.
Implementation Method 1
the reflective units include a reflective surface on one side away from the backplate... effectively reflect light emitted from lateral sides of the mini-light-emitting diodes to a light-emitting surface
Data Source
AI summary
A light-emitting module and a display device are provided. Reflective units are disposed, which include a main body disposed on a backplate and a reflective part disposed on the main body. The main body is provided with a retaining wall structure on one side away from the backplate, and an orthographic projection of the reflective part on the backplate covers an orthographic projection of the main body on the backplate, thereby effectively blocking a flow of a material of the reflective part, thereby controlling a height of the reflective part.