Light-Emitting Window Structure for Uniform LED Output
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Solution Overview
Problem
Conventional light-emitting devices face challenges in achieving high light output efficiency and uniformity, often resulting in hot spots and suboptimal lighting performance.
Innovation Solution
A light-emitting device design featuring a transparent substrate with a reflection structure and light-emitting unit, where the reflection structure includes a reflection layer and circuit layer configured to define a light-transmitting window, allowing light to enter and exit through the substrate while minimizing output through the input surface, and incorporating a light-shielding unit to prevent hot spots and enhance uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If light-emitting units are increased to improve lighting uniformity, then lighting uniformity is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
A reflection structure is introduced as an intermediary component between the light-emitting units and the transparent substrate. This reflection structure includes a reflection layer and circuit layer that work together to redirect and distribute light more uniformly across the display panel, reducing the need for multiple light-emitting units and thereby simplifying device complexity while maintaining lighting uniformity
Solution Approach 2:
The reflection structure is selectively positioned at specific locations within the display panel, particularly near the edges and corners where light distribution is typically insufficient. By locally enhancing light reflection and redirection in these critical areas, the patent achieves improved lighting uniformity without requiring uniform distribution of multiple light-emitting units across the entire panel
2Illumination intensity
If light-emitting units are increased to eliminate hot spots, then lighting uniformity is improved, but manufacturing cost increases
Solution Approach 1:
The reflection structure serves as a cost-effective intermediary that redistributes light from fewer LED units to eliminate hot spots. By strategically positioning the reflection layer and circuit layer, the system achieves uniform light distribution without the high manufacturing cost associated with installing multiple LED units across the entire display panel
Solution Approach 2:
The patent modifies the optical parameters of the display panel by introducing materials with specific reflective properties. The reflection layer and circuit layer are designed with particular reflectivity characteristics that enable effective light redirection, allowing uniform lighting to be achieved through optical parameter optimization rather than increasing the number of light-emitting units
3Loss of energy
If reflection structure is added to improve light output efficiency, then light output efficiency is improved, but device complexity increases
Solution Approach 1:
The reflection structure combines multiple functional layers into a single integrated component. The reflection layer and circuit layer are merged into one structure that simultaneously provides light reflection, electrical connection, and structural support functions. This merging approach improves light output efficiency by reducing light loss while minimizing the increase in device complexity through functional integration
Solution Approach 2:
The circuit layer in the reflection structure serves multiple functions: it provides electrical connections for the LED units, acts as a reflective surface to redirect light, and contributes to the overall structural integrity of the display panel. This multi-functionality allows the system to improve light output efficiency without proportionally increasing device complexity, as the same component performs multiple roles
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 achieves higher light output efficiency and uniformity, reducing the need for multiple light-emitting units and lowering manufacturing costs while preventing hot spots and ensuring consistent lighting.
Implementation Method 1
The reflection structure includes a reflection layer and a circuit layer, and the reflection structure is configured to define a light-transmitting window
Data Source
AI summary
A light-emitting device comprises a transparent substrate, a reflection structure and a light-emitting unit. The transparent substrate is defined with a first surface and a second surface opposite to each other. The reflection structure is disposed on and contacts the second surface of the transparent substrate. The reflection structure includes a reflection layer and a circuit layer. The reflection structure is configured to define a light-transmitting window. The light-emitting unit is disposed corresponding to the light-transmitting window. The light-emitting unit is electrically connected to the circuit layer of the reflection structure, and one optical path of the light-emitting unit passes through the light-transmitting window.