LED Display Tilted Peak Emission for Elevated Mounting
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Solution Overview
Problem
Conventional LED displays mounted above eye level suffer from significant light wastage due to peak emission characteristics being perpendicular to the viewer's line of sight, leading to inefficient light distribution and increased mounting complexity to address this issue.
Innovation Solution
The LED packages are designed with a tilted or shifted peak emission to match the mounting height and location of the display, achieved by adjusting the position of the LED within a reflective cup and encapsulant, allowing for a more directed light output that aligns with the viewer's line of sight without the need for complex mounting hardware.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the LED display is mounted at an elevated position above eye level, then the display can be visible from far away and large areas can be covered, but the peak emission light is directed perpendicular to the display surface causing significant light wastage and reduced visibility to viewers below
Solution Approach 1:
The patent introduces asymmetric optical elements (prisms, lenses, or reflective surfaces) at specific locations on the LED display to redirect light asymmetrically toward the viewer's line of sight. This asymmetric light redirection ensures that elevated displays direct more light downward to viewers below rather than uniformly in all directions, thereby improving illumination intensity for the target audience while reducing overall light wastage.
Solution Approach 2:
The patent modifies the emission parameters of the LED display by changing the angular distribution of light through optical elements. By adjusting the emission pattern from a uniform perpendicular distribution to a directed distribution toward the viewer's line of sight, the system improves light delivery to viewers while minimizing energy loss in unwanted directions.
2Ease of manufacture
If the display is mounted perpendicular to the viewer's line of sight, then the mounting structure is simple and straightforward, but the peak emission characteristic causes most light to be wasted and not directed toward viewers
Solution Approach 1:
The patent extracts the light redirection function from the mounting structure itself and places it in separate optical elements (prisms, lenses, reflective surfaces) that are integrated with the LED packages. This allows the mounting structure to remain simple and perpendicular while the optical elements handle the light direction, separating the structural simplicity requirement from the light direction requirement.
Solution Approach 2:
The patent introduces optical intermediaries (prisms, lenses, reflective surfaces) between the LED light source and the viewer. These intermediary elements redirect the light path without requiring the display structure itself to be angled, maintaining mounting simplicity while ensuring light is directed toward viewers below.
3Illumination intensity
If the display is angled to match the viewer's line of sight, then light distribution to viewers is improved, but the mounting hardware becomes complex and expensive particularly for very large displays at high elevations
Solution Approach 1:
The patent extracts the light direction function from the mounting hardware and places it in optical elements integrated with the LED packages. This allows the display to be mounted perpendicular to the support structure, simplifying the mounting hardware, while the optical elements handle the light redirection to match the viewer's line of sight.
Solution Approach 2:
The patent replaces the mechanical solution of angling the entire display structure with an optical solution using prisms, lenses, or reflective surfaces. Instead of mechanically tilting heavy display structures, the system uses optical elements to redirect light paths, significantly reducing mounting hardware complexity while maintaining effective light distribution to viewers.
4Ease of manufacture
If conventional LED packages with perpendicular peak emission are used, then the LED packages are simple and cost-effective, but the overall display efficiency is reduced due to light wastage
Solution Approach 1:
The patent merges the light redirection function with the LED package structure by integrating optical elements (prisms, lenses, reflective surfaces) directly into the LED package assembly. This combination maintains the simplicity and cost-effectiveness of conventional LED packages while adding the light direction capability, thereby improving display efficiency without significantly complicating the package design or manufacturing.
Solution Approach 2:
The patent modifies the emission parameters of the LED package by incorporating optical elements that change the angular distribution of light. This parameter change redirects the peak emission from a uniform perpendicular pattern to a directed pattern toward the viewer's line of sight, improving display efficiency while maintaining package simplicity.
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 solution enhances light distribution to the viewer, reducing wastage and allowing for brighter, more vivid displays while simplifying the mounting process, as the tilted emission pattern directs more light along the viewer's line of sight without requiring the display to be mounted at an angle.
Implementation Method 1
mounted in a reflective cup, with the LED shifted off the center of the reflective cup
Data Source
AI summary
LED packages and LED displays utilizing the LED packages are disclosed where the peak emission of the LED display can be tilted or shifted to customize its peak emission to the mounting height or location of the LED display. One embodiment of an LED display comprises a plurality of LED package where the peak emission from at least some of the LED packages is tilted off the package centerline. The LED packages are mounted within the display in such a way as to generate an image having a peak emission that is tilted off the perpendicular emission direction of the display.