Omnidirectional LED Lamp with Annular Reflector
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Solution Overview
Problem
LED lamps with chip on board (COB) technology face challenges in achieving a large beam angle due to their flat heat transfer board design, resulting in uneven luminous intensity and difficulties in producing omnidirectional lighting with uniformity, as existing solutions require complex 3D structures and manual alignment.
Innovation Solution
An LED lamp design featuring a lamp holder, bulb shell, light emitting unit, and a reflecting unit with an annular reflecting surface that faces the light emitting unit, reflecting light towards the bottom of the bulb shell to enhance luminous intensity and achieve an omnidirectional beam angle without the need for complex 3D structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If light sources are mounted on planes of different angles using spherical sector shaped shells, then omnidirectional beam angle is obtained, but uniform luminance on shell surfaces is difficult to achieve and spots and dark areas are generated
Solution Approach 1:
The invention divides the light emitting unit into multiple independent LED light sources arranged on a flat heat transfer substrate. Each LED chip emits light independently, and the combined effect achieves omnidirectional illumination without requiring complex 3D shell structures, thus avoiding uniform luminance issues.
Solution Approach 2:
The invention uses a flat 2D heat transfer substrate to mount LED chips, eliminating the need for 3D spherical sector shells. By arranging LEDs in a planar configuration with reflective surfaces below, the system achieves omnidirectional light distribution without the complexity of three-dimensional light source mounting structures.
2Illumination intensity
If light sources are mounted on planes of different angles using spherical sector shaped shells, then omnidirectional beam angle is obtained, but mass production is difficult due to increased paste aluminum base load
Solution Approach 1:
The invention uses a flat heat transfer substrate that can be easily segmented and standardized for mass production. Multiple LED chips are mounted on identical flat substrates using standard SMT processes, eliminating the need for custom 3D aluminum bases for each light source plane.
Solution Approach 2:
The invention changes the mounting plane from 3D spherical sector surfaces to a 2D flat substrate. This parameter change enables the use of standard manufacturing processes and simplifies the aluminum base design, making mass production feasible while maintaining omnidirectional beam angle through reflective surfaces.
3Illumination intensity
If light sources are mounted on planes of different angles using spherical sector shaped shells, then omnidirectional beam angle is obtained, but automatic alignment of light sources to aluminum base is difficult which reduces productivity
Solution Approach 1:
The invention transitions from 3D spherical sector shell mounting to 2D flat substrate mounting. This dimensional simplification enables automatic alignment using standard SMT pick-and-place machines, as flat substrates provide stable reference planes and standardized mounting patterns that are easily automated.
Solution Approach 2:
The invention pre-positions LED chips on the flat heat transfer substrate using standardized mounting patterns before final assembly. This preliminary arrangement on a flat surface allows for automated alignment and assembly processes, eliminating the need for complex real-time alignment of 3D mounted light sources.
4Temperature
If COB LED light sources are fixed on a flat heat transfer board, then heat dissipation efficiency is improved, but beam angle is limited to less than 180 degrees and luminous intensities are uneven
Solution Approach 1:
The invention introduces reflective surfaces (reflective paint or reflective plates) as intermediaries between the LED light sources and the environment. These reflective surfaces redirect light that would otherwise be absorbed or scattered, achieving omnidirectional beam angle and uniform luminous intensity while maintaining the flat heat transfer board configuration for efficient heat dissipation.
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 solution provides a simple and cost-effective way to achieve an omnidirectional beam angle with uniform light distribution, avoiding shadows and dark spots, and improving heat dissipation efficiency while maintaining a seamless and easy-to-produce design.
Implementation Method 1
The reflecting member is fixed on the lamp holder, and includes an annular reflecting surface. The reflecting surface of the reflecting member faces the lighting emitting unit for reflecting light generated by the light emitting unit towards a bottom of the lamp bulb shell.
Data Source
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AI summary
A large-angle omnidirectional lighting LED lamp (100), comprises a lamp bulb shell (40) and a light emitting unit (30). The lamp bulb shell (40) covers the light emitting unit (30). The large-angle omnidirectional lighting LED lamp also comprises a reflecting unit (50). The reflecting unit (50) comprises a reflecting component (52), and the reflecting component (52) is fixed on the lamp bulb shell (40). The reflecting component (52) is provided with an annular reflecting surface, and the annular reflecting surface of the reflecting component (52) is arranged corresponding to the light emitting unit (30) in order to reflect the light emitted from the light emitting unit (30) to the bottom of the lamp bulb shell (40). The large-angle omnidirectional lighting LED lamp (100) has the advantage of simple structure.