LED Package Module With Intersecting Orientation For Wide Beam Angle
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Solution Overview
Problem
Existing display devices with LED package modules have narrow beam angles, making it difficult to reduce the number of LED packages without decreasing luminance, which limits price competitiveness and increases the light-incident bezel area due to overlapping light from adjacent packages.
Innovation Solution
The LED package module is designed with LED packages oriented in intersecting directions on the substrate, providing a wide beam angle of 125 to 130 degrees, allowing for reduced package numbers while maintaining luminance through increased emission efficiency in the lateral direction, and employing a milky buffer pad for optimal absorption and reflection to overcome light bouncing defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If LED packages are arranged with narrow beam angles, then the light distribution is concentrated, but the number of LED packages must be increased to maintain luminance, increasing device complexity and cost
Solution Approach 1:
The patent changes the beam angle parameter from narrow to wide (125-130 degrees) by modifying the LED package structure, specifically by removing side walls of the mold frame to enable light emission in multiple directions. This parameter change allows fewer LED packages to achieve the required luminance, resolving the contradiction between illumination intensity and device complexity
Solution Approach 2:
The patent transitions from unidirectional light emission (narrow beam angle) to multidirectional light emission (wide beam angle) by opening the mold frame structure. This dimensional change in light emission pattern allows adjacent LED packages to share light emission areas, reducing the total number of packages needed while maintaining luminance
2Speed
If LED packages are arranged with narrow beam angles, then the light emission is directional, but the light-incident bezel area increases due to overlapping light from adjacent packages
Solution Approach 1:
The patent changes the beam angle parameter from narrow to wide (125-130 degrees) by modifying the LED package structure, specifically by removing side walls of the mold frame to enable light emission in multiple directions. This parameter change allows fewer LED packages to achieve the required luminance, resolving the contradiction between illumination intensity and device complexity
Solution Approach 2:
The patent transitions from unidirectional light emission (narrow beam angle) to multidirectional light emission (wide beam angle) by opening the mold frame structure. This dimensional change in light emission pattern allows adjacent LED packages to share light emission areas, reducing the total number of packages needed while maintaining luminance
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 reduces the number of LED packages, enhancing price competitiveness without degrading display quality and enabling a narrower bezel by improving light distribution and absorption, thus addressing the limitations of existing technologies.
Implementation Method 1
An LED is widely used as the light source for display
Implementation Method 2
The LED chip 54b emits light of red (R), green (G) and blue (B) colors
Implementation Method 3
employing a milky buffer pad for optimal absorption and reflection to overcome light bouncing defects
Data Source
AI summary
Disclosed herein are an LED package module capable of lowering the price of manufacture by simply reducing the number of LED packages without decreasing the luminance, and a display device having the same. To this end, in an LED package module according to an exemplary embodiment of the present disclosure and a display device having the same, a plurality of LED packages is mounted on an LED module substrate in a matrix such that the LED packages are oriented in intersecting directions alternately in each of the longitudinal and lateral directions. Consequently, it is possible to increase price competitiveness by simply reducing the number of LED packages without degrading the display quality.