Micro LED Lens Stack and Partition for Higher Display Luminance
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Solution Overview
Problem
The challenge is to improve the luminance of display devices using small-sized light emitting devices, such as micro LEDs and mini LEDs, which typically suffer from reduced luminance due to their smaller size and predetermined beam angle.
Innovation Solution
The proposed solution involves a light emitting module that includes a light emitting device, a first lens disposed above the device to collect light, and a partition member extending in an up-down direction to surround the lens. Additionally, a first lens support member is included to support the first lens and allow light to pass through, and a second lens with a downwardly convex shape is used to further collect light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If small-sized light emitting devices (micro LED or mini LED) are used, then the display device can achieve high resolution, but the luminance is reduced
Solution Approach 1:
The patent introduces a vertical stacking dimension by placing multiple lenses (first lens and second lens) above the light emitting device in the up-down direction. This three-dimensional optical path control allows light from small LEDs to be collected and directed more effectively, increasing luminance without compromising the horizontal resolution achieved by small LED sizes.
Solution Approach 2:
The patent employs a nested structure where the first lens and second lens are arranged in sequence along the optical path, with each lens contributing to light collection and direction. The partition member also creates a nested configuration by surrounding the lenses while allowing light transmission. This nested arrangement maximizes light utilization from small LED sources.
2Manufacturing precision
If the size of light emitting device is reduced, then high-resolution display is enabled, but the amount of light generated decreases
Solution Approach 1:
The first lens and second lens act as intermediary optical elements between the small light emitting device and the display surface. These lenses mediate the light transmission process by collecting divergent light from the small LED and redirecting it, thereby increasing the effective light quantity reaching the display area without changing the LED size.
Solution Approach 2:
By extending the optical system into the vertical dimension with multiple lenses stacked above the LED, the patent captures light that would otherwise be lost at wider angles. This dimensional extension of the optical path increases the effective light collection area and directs more light toward the display surface.
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 configuration effectively improves the luminance of the light emitting module even when using small-sized light emitting devices, enabling the implementation of high-resolution, high-brightness display devices.
Implementation Method 1
a first lens disposed above the light emitting device to collect light generated from the light emitting device
Implementation Method 2
a second lens disposed above the first lens to collect light passing through the first lens
Data Source
AI summary
According to one aspect of the present disclosure, there may be provided a light emitting module including: a light emitting device that generates light; a lens disposed above the light emitting device to collect light generated from the light emitting device; and a partition extending in an up-down direction to surround at least a portion of the first lens.