Light Control Layer Protrusions for Uniform LED Light Extraction
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Solution Overview
Problem
Existing light emitting apparatuses face challenges in controlling thickness uniformity of molding materials, leading to low controllability of light emission, color mixing, and deterioration in luminance.
Innovation Solution
A light emitting apparatus featuring a first light control layer with protrusions on its upper surface, allowing for controlled surface roughness and improved light extraction efficiency, while preventing color mixing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a typical light emitting apparatus uses molding material covering multiple light emitting diodes, then light can spread to the display panel, but thickness uniformity of the molding material cannot be properly controlled
Solution Approach 1:
The invention divides the light emitting apparatus into separate individual LED units rather than grouping multiple LEDs under a single molding material. Each LED is housed in its own reflective housing, eliminating the need for thick molding material and enabling precise thickness control while maintaining effective light spreading to the display panel.
2Illumination intensity
If molding material is used to cover light emitting diodes, then light can be emitted, but surface leveling control deteriorates
Solution Approach 1:
By separating each LED into its own housing unit, the invention eliminates the surface leveling issues associated with molding material. Each housing can be independently manufactured with precise surface flatness, and the array of housings provides uniform surface leveling across the entire light emitting apparatus.
3Illumination intensity
If molding material covers multiple light emitting diodes, then light can spread, but color mixing occurs
Solution Approach 1:
The invention physically separates different colored LEDs into individual housings, preventing color mixing that occurs when multiple LEDs are covered by a single molding material. Each housing contains only one LED color, ensuring color purity while still allowing light to spread effectively to the display panel through the reflective housing design.
4Illumination intensity
If molding material is used to cover light emitting diodes, then light can be emitted, but luminance deteriorates
Solution Approach 1:
By eliminating the molding material that causes luminance deterioration, the invention uses individual reflective housings for each LED. The reflective surfaces in each housing direct and concentrate light emission, improving overall luminance while maintaining effective light distribution to the display panel.
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 solution achieves high controllability of light emission, prevents color mixing, and enhances luminance by ensuring uniform light emission and improved light extraction efficiency.
Implementation Method 1
a first light control layer allowing light transmission therethrough and covering the light emitting device, wherein the first light control layer has at least one protrusion formed in at least some region on an upper surface thereof
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 2C
AI summary
A light emitting apparatus and a display apparatus including the same are disclosed. The light emitting apparatus includes at least one light emitting device and a first light control layer allowing light transmission therethrough and covering the light emitting device.