Micro LED Module With Diffusion Layer for Uniform Light Output
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Solution Overview
Problem
Micro LEDs in display devices face challenges in process control efficiency and image imbalance due to their small size, making it difficult to mount them on display panels and causing light concentration at the center, leading to image distortion.
Innovation Solution
A light emitting device module comprising a circuit board, a semiconductor light emitting device, a reflective layer with an opening, and a molding layer with a diffusion pattern layer, which includes a heat-resistant layer and a light diffusion layer to control light direction and distribution, thereby improving manufacturing efficiency and reducing image imbalance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If micro LEDs are used to achieve high-resolution display, then display resolution is improved, but process control efficiency deteriorates due to small size
Solution Approach 1:
The patent segments the light emitting device into a semiconductor light emitting device (micro LED chip) and a separate module structure. The micro LED chip is mounted on a circuit board with reflective and molding layers, creating a modular assembly that is easier to handle and control while maintaining the high resolution benefits of small micro LEDs.
2Measurement precision
If micro LEDs are arrayed on two-dimensional plane to correspond to each sub-pixel, then display resolution is improved, but mounting difficulty increases due to small size
Solution Approach 1:
The patent performs preliminary actions by pre-assembling the micro LED chip with the reflective layer and molding layer to form a complete module before mounting it on the display panel. This pre-assembly process makes the mounting step easier and more efficient, as the entire light emitting assembly is prepared in advance rather than assembling individual components during panel manufacturing.
3Duration of action of stationary object
If light emitting diode structure is used, then long life span and low power consumption are achieved, but image imbalance occurs with light concentration at center
Solution Approach 1:
The patent applies local quality by creating a reflective layer with a specific reflective pattern that has different properties in different regions. The reflective layer includes a central region and peripheral regions with different reflectivity characteristics, allowing light to be redistributed from the center to the periphery, thereby correcting the image imbalance while maintaining the LED's long lifespan and low power consumption advantages.
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 module enhances process efficiency and effectively controls image imbalance by guiding and diffusing light uniformly, reducing light concentration at the center, and improving overall light distribution.
Implementation Method 1
a molding layer with a diffusion pattern layer, which includes a heat-resistant layer and a light diffusion layer to control light direction and distribution
Implementation Method 2
a reflective layer including an opening through which the semiconductor light emitting device is exposed, and covering the circuit board
Data Source
AI summary
The present disclosure relates to a light emitting device module including a circuit board, a semiconductor light emitting device mounted on the circuit board, a reflective layer including an opening through which the semiconductor light emitting device is exposed, and covering the circuit board, and a molding layer covering the semiconductor light emitting device and the reflective layer. A light emitting surface of the semiconductor light emitting device is formed on an upper surface facing vertically upward.