LED Module Alternating Transmissive and Light Blocking Faces
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
When constructing an LED module with tiny LED devices in close proximity, the color emission shifts due to light emitted from one device exciting phosphors in adjacent devices, leading to light loss and undesirable chromaticity changes.
Innovation Solution
The LED module is designed with alternating LED devices, where one device has optically transmissive side faces covered with phosphor resin and the other has light blocking side faces formed from a white reflective member, preventing light from entering adjacent devices and maintaining consistent color emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If LED devices are arranged in close proximity to increase brightness, then the quantity of light output increases, but light emitted from one device excites phosphors in adjacent devices causing color shift and light loss
Solution Approach 1:
The patent divides the side faces of LED devices into different functional types: some LED devices have optically transmissive side faces while adjacent ones have light blocking side faces. This segmentation prevents light from one LED device from entering adjacent devices, eliminating the harmful interaction that causes color shift and energy loss while maintaining high brightness through close packing.
Solution Approach 2:
Different LED devices in the array are given different local properties: some have optically transmissive side faces covered with phosphor resin, while others have light blocking side faces formed from white reflective member. This local differentiation allows the system to maintain both high illumination intensity and prevent light loss by controlling light propagation paths between adjacent devices.
2Area of stationary object
If LED devices are arranged in close proximity to reduce module size, then the area occupied decreases, but color emission shifts due to light interaction between adjacent devices
Solution Approach 1:
The patent segments the LED device array into alternating types with different side face properties. This segmentation allows devices to be placed in close proximity for compact module area while preventing light from one device from exciting phosphors in adjacent devices, thereby maintaining stable color emission characteristics.
Solution Approach 2:
By assigning different local qualities to different LED devices (optically transmissive versus light blocking side faces), the patent enables close packing for reduced module area while preventing the harmful light interactions that would otherwise cause color shift, thus maintaining color emission stability.
3Illumination intensity
If all LED devices have optically transmissive side faces to maximize light output, then the total light emission increases, but light enters adjacent devices causing chromaticity variation
Solution Approach 1:
The patent segments the LED device population into two groups with different side face configurations. This segmentation allows the system to maintain high total light emission while preventing chromaticity variation by ensuring that light from optically transmissive devices does not enter adjacent devices with phosphor-coated sides.
Solution Approach 2:
By applying different local qualities to different LED devices (optically transmissive versus light blocking side faces), the patent achieves both high light emission and chromaticity consistency. The light blocking side faces prevent harmful light interactions that would cause chromaticity variation while the optically transmissive faces maximize light output.
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 arrangement reduces light loss and prevents color shift, allowing for bright and consistent light emission without chromaticity variation, even when LED devices are closely packed.
Implementation Method 1
the other has light blocking side faces formed from a white reflective member, preventing light from entering adjacent devices
Implementation Method 2
one device has optically transmissive side faces covered with phosphor resin
Data Source
AI summary
Provided is an LED module which, even when CSP LED devices are arrayed adjacent to each other, emits light at a light emission color of a single LED device and is bright. An LED module includes a module substrate, first LED devices having a lateral surface which is configured of an optically transmissive face, and second LED devices having a lateral surface which is configured of a light blocking face. The first LED devices are mounted upon the module substrate adjacent to the second LED devices such that the translucent faces of the first LED devices and the light blocking faces of the second LED devices are in opposition.