Light-Emitting Module Protrusion Sidewall Reflects Light
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Solution Overview
Problem
Conventional light-emitting modules suffer from energy inefficiency and reliability issues due to light attenuation and loss in the partition layer, leading to increased power consumption and heat generation.
Innovation Solution
A light-emitting module design featuring a protrusion with a sloping sidewall inside the light-transmitting partition, which reflects light emitted from the light-emitting element, and an optical bonding layer with a higher refractive index than the partition material, enhancing light extraction and reducing power consumption while inhibiting heat generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a light-transmitting partition is used to separate light-emitting elements, then light emission is enabled, but light attenuation and loss occur reducing energy efficiency
Solution Approach 1:
The invention converts the harmful light attenuation and loss in the partition into a beneficial effect by introducing a reflective protrusion. The protrusion reflects light that would otherwise be lost back toward the light-emitting element, transforming the partition from a light-blocking obstacle into a light-managing component that improves overall energy efficiency
Solution Approach 2:
The invention adds a dimensional element by introducing a protrusion with a sloping sidewall into the partition structure. This three-dimensional feature creates additional light reflection pathways, changing the light interaction from simple transmission/blockage to multi-directional reflection and transmission, thereby reducing light loss
2Use of energy by stationary object
If conventional light-emitting module design is used, then structure is simple, but power consumption is high due to light loss
Solution Approach 1:
The reflective protrusion converts previously lost light energy into useful light output, reducing the amount of electrical power needed to achieve the same luminous output. By recovering light that would otherwise be absorbed or scattered by the partition, the system reduces overall energy consumption
Solution Approach 2:
The invention changes the optical parameters of the partition by introducing a reflective surface with specific geometric characteristics (sloping sidewall). This parameter change alters the light propagation path and improves light extraction efficiency, thereby reducing the power required to maintain desired brightness levels
3Illumination intensity
If light is emitted with high intensity, then luminance is sufficient, but heat generation increases reducing reliability
Solution Approach 1:
The reflective protrusion recovers light that would otherwise be lost, allowing the system to achieve sufficient luminance at lower power levels. This reduces the conversion of electrical energy to heat, thereby reducing heat generation and improving reliability without sacrificing luminance output
4Loss of energy
If partition material with lower refractive index is used, then light extraction is improved, but light attenuation in partition increases
Solution Approach 1:
The reflective protrusion acts as an intermediary element within the partition. It intercepts light that would be attenuated by the partition material and redirects it back toward the light-emitting element, effectively decoupling the refractive index requirements for light extraction from the light attenuation problem
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 high energy efficiency, reduced power consumption, and improved reliability by effectively reflecting and extracting light, minimizing light attenuation and heat generation.
Implementation Method 1
The sidewall of the protrusion can reflect light emitted from the light-emitting element
Implementation Method 2
an optical bonding layer with a higher refractive index than the partition material, enhancing light extraction
Data Source
AI summary
One embodiment of the present invention relates to a light-emitting device comprising an insulating surface; a lower electrode over the insulating surface; a protrusion over the insulating surface having a sidewall sloping toward the lower electrode; a light-transmitting partition overlapping with an end portion of the lower electrode and the sidewall of the protrusion; and a light-emitting element including the lower electrode, an upper electrode overlapping with the lower electrode, and a layer containing a light-emitting organic compound between the lower electrode and the upper electrode. In the light-emitting device, the sidewall of the protrusion can reflect light emitted from the light-emitting element. As a result, the light-emitting device that has reduced power consumption is provided.